APPENDIX 10.4 - CHECKLISTS

SAFETY DIAGNOSIS CHECKLISTS

Municipality:                                                                                                                           

Location:                                                                                                                                

Date:                                                                                                                                      

Analyst:                                                                                                                                  

Analysis objectives:                                                                                                                 

                                                                                                                                              

                                                                                                                                              

                                                                                                                                              

                                                                                                                                              

STEP 1 - GATHER RELEVANT INFORMATION

ELEMENT

OK

COMMENTS

Data

Crash

 

Traffic

 

Geometry

 

Conclusions of previous studies

(safety, sight distance, spot speed, skid resistance, etc.)

 

Maintenance reports

 

Photos/videos

 

Employees’ knowledge

 

Requests/complaints/discussions

(road users, local residents local government officials)

 

Others

 

Conclusions:

STEP 2 – ANALYSE DATA

TASK

OK

COMMENTS

Select crash period and retrieve data

from                      to                      

 

 

Prepare crashes summaries

(Section 10.3_analyse data)

frequency diagram

factor matrix

collision diagram.

 

Calculate safety indicators

(Section 10.3 _ criteria for selecting locations to investigate for treatment)

 

 

Determine abnormal crash patterns

(Appendix 10.2 Procedure – Binomial proportion)

 

 

Search for crash factors

(Appendix 10.3)

(to be completed at the site)

 

 

STEP 3 - SITE INSPECTIONS – PREPARATION

Gather the following items:

ITEM

OK

In all studies:

  • Camera (film or memory, batteries)
  • Video recorder and sufficient recording medium Measuring tape and measuring wheel Notebook, pencils, eraser, rule
  • Cell phone Existing drawings
  • Conclusions from previous studies Diagnostic checklists
  • Crash tables

 

 

According to study requirements:

 

 

For the analysts’ safety:

  • Safety helmet, jacket and boots
  • Flashing lights and other signalling equipment Police assistance (where necessary)

 

 

STEP 3 - SITE INSPECTIONS – FAMILIARIZATION

TASKS

OK

COMMENTS

Travel through the site in all directions and note obvious problems:

  • road characteristics.
  • traffic operation.
  • road user behaviour.

 

 

Verify the overall coherence of the road environment based on:

 

 

Road category

Section           

Number of lanes (road)

 

main

minor

Intersection

Type

T

+

Y

X

>4

roundabout

 

 

main

minor

artery

1 lane

collector road

2 lanes

local road

Multi-lane

Area

Traffic control

Road type

rural                

urban               

none

yield

stops (minor)

multiple stops

traffic signals

 

main

minor

undivided

divided

freeway

Speed limit

Traffic

Adjacent land use

  

Main                  km / h Minor                 km / h

Is the posted speed coherent with the road function, road characteristics, road use and land use?

yes       no

☐    ☐

Volume

motorized

passenger:

2-wheel :

Bus:

heavy vehicle:

others:

non-motorized

pedestrian:

cyclist:

others:

Residential

Commercial

Industrial

Agricultural

Forestry

Others

                        

Check for obvious human factor problems:

(drivers’ expectancies, driving task)

Features that drivers may find surprising (violation of expectancies)

unusual or unexpected change in alignment, cross-section, road surface, signing, marking, traffic, land use

Check violations of:

  • short-term expectancies (acquired during the trip);
  • long term expectancies (acquired during a driver’s life)
  • event related expectancies (rare events)

Overload possibilities

  • Too many stimuli
  • Information too complex

Drowsiness or inattention possibilities

 

 

 

 

 

 

 

 

 

 

STEP 3 - SITE INSPECTIONS – SITE HISTORY

TASK

OK

 
Check whether problems detected in past studies have been successfully treated.

 

Conclusions:

STEP 3 - SITE INSPECTIONS – PROBLEMS AT SIMILAR SITES

TASK

OK

 
Check whether problems that are frequently observed at similar sites are present at this site (based on results of previous studies at similar sites, available guides, etc.).

 

Conclusions:

STEP 3 - SITE INSPECTIONS – CRASH FACTORS

TASK

OK

 

Complete the crash analysis that has been initiated by verifying, for each deviant crash pattern, the potential contributes factors and possible actions (based on Tables in Appendix 10.3).

 

Conclusions:

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

ROAD SECTIONS

YES

NO

COMMENTS

TRAFFIC OPERATIONS

Have site observations been completed without any hazardous traffic conditions being seen?

  • vehicle platoons
  • excessive travel times (on mobility roads)
  • tailgating
  • hazardous passing manoeuvres
  • significant speed differentials
  • significant mass differentials
  • important speed differentials
  • important mass differentials

(If needed, conduct a traffic count, a travel time study or a capacity analysis)

   
Speed: Are operating speeds adequate for road conditions? (if needed, conduct a spot speed study).   
Traffic conflict: Have site observations been completed without seeing any obvious traffic conflict problem (related to road accesses, parkings, etc.)?   

Conclusions:

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

HORIZONTAL

ALIGNMENT

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Speed:

Are observed speeds in curve safe?

  • compare with posted speed and design speed.

Is the speed reduction required in the approach to the curve compatible with safe traffic operations?

  • calculate speed differentials between the curve and its adjacent segments.
  • skidding (or skid marks).

 

 

 

Braking:

Are braking manoeuvres safely performed?

  • late braking, brake marks.

 

 

 

Encroachment:

Have site observations been completed without seeing hazardous encroachment?

 

 

 

ROAD CHARACTERISTICS

 

 

 

Curve radius:

Is the curve radius adequate for the road category and traffic conditions?

  • compare with recommended standards.
  • avoid sharp curves on arteries.

Is the risk of overturning low?

  • calculate overturning speed and skidding speed .

 

 

 

Lane width:

Are lane widths sufficient for safe traffic operation? road width

 

 

 

Shoulder:

Do shoulders allow the safe recovery of errant vehicles?

  • lane/shoulder drop off, shoulder width, surface material, stability, erosion, obstacles (trees, etc.).

 

 

 

Surface condition:

Is the skid resistance adequate?

  • surface polishing, bleeding, contamination.
  • friction tests (if needed).

Is the evenness adequate?

  • potholes, waves, rutting, etc.

Is the road surface free of water (or traces thereof)?

Is the road surface free of loose material (sand, rocks, leaves, etc.)?

 

 

 

Superelevation: Is superelevation adequate?

  • Height, transition between tangent and curve.
  • Drainage condition in transition zone.

 

 

 

Roadside condition:

In the required clearance zone, are roadsides free of features that may increase crash severity?

  • steep side slopes.
  • rigid obstacles (trees, poles, rocks, etc);
  • inadequate end treatment of road equipment (bridge, barrier, drainage structure, etc.).

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

HORIZONTAL

ALIGNMENT (continued)

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

Roadside condition: (continued)

Are safety barriers in good condition?

Is roadside equipment free of damage that may have been caused by errant vehicles?

Are roadsides free of features or activities that may overly distract drivers (commercial signs, stands, etc.)?

 

 

 

Sight distance: Is the road alignment obvious?

  • check for features that may create confusion as to the road alignment (minor road in the continuity of the road tangent, pole or tree line at angle with the road alignment, horizontal

curve after a crest vertical curve, etc.).

Are the available sight distances sufficient to allow safe stopping manoeuvres (throughout the curve)?

  • Compare available sight distances with required stopping distances.

Are roadsides on curve interior free of features that may impede visibility?

  • beware of seasonal or temporary sources of sight obstruction that may not be present during the site visit (parked vehicles, vegetation, etc.).
  • check for sources of traffic conflicts or road hazards where sight is restricted (intersection, crossing, driveway, narrow structure, etc).

 

 

 

Overtaking:

Is overtaking clearly prohibited if unsafe (marking, median barrier)?

  • compare available sight distances with required passing distances.

Have site observations been completed without seeing any hazardous passing manoeuvre?

Are there sufficient passing opportunities on the road, based on road category and traffic conditions?

 

 

 

Warning sign/device:

Do warning signs/devices comply with standards?

  • missing or superfluous equipment, size, location (height and lateral offset), message simplicity.

Is the warning level well-suited to the situation?

  • advisory speed sign if required.

Are the visibility and conspicuity of warning signs and devices adequate? Are warning signs/devices in good condition?

  • worn, broken, unclean, non-retro reflective.

Are sign supports adequately shielded or made frangible if required?

 

 

 

Combination of features: Is the horizontal curve free of additional features that may increase crash severity?

  • combination of horizontal and vertical alignment, intersection, crossing, narrow bridge, etc.

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

VERTICAL ALIGNMENT - DOWNHILL

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Speed: 

  • Are truck downhill speeds safe?
  • Are speed differentials between cars and trucks compatible with safe traffic operations?

 

 

 

Braking: 

If braking manoeuvres are required, are they safely completed (at intersection, access)?

  • late braking, brake marks, traffic conflicts.

Platoon:

Are vehicles platoons unlikely to form?

  • based on grade features and traffic conditions.

 

 

 

ROAD CHARACTERISTICS

 

 

 

Grade percentage and length:            

Are grade percentages and lengths unlikely to cause safety problems?

  • compare with recommended standards.
  • calculate the truck brake temperature

Are drivers likely to expect the grade features?

  • beware of first steep grade, compound grades.

 

 

 

Warning signs/device

Do warning signs/devices comply with standards?

  • missing or superfluous devices, size, location, height and lateral offset, message simplicity.

Is the warning level well-suited to the situation?

  • advance warnings if required.

Are the visibility and conspicuity of signs/devices adequate?

Are warning signs/devices in good condition?

  • worn, broken, unclean, non-retro reflective.

 

 

 

Safety facility  check brake area arrested bed:

Are the required safety facilities available at the site?

  •  Brake check area, arrester bed, others. 

Are features of the safety facilities adequate?

  • location, alignment, geometry, material, etc.

Are the safety facilities well maintained?

 

 

 

Surface condition:

Is the skid resistance adequate?

  • surface polishing, bleeding, contamination.
  • friction tests (if needed).

Is road surface’s evenness adequate?

  • potholes, waves, rutting, etc.

Is the road surface free of loose material (sand, rocks, leaves, etc.)?

 

 

 

Drainage:

Are drainage facilities adapted to rainfall conditions?

  • water accumulation, erosion.

Are drainage structures safe for all road users (including two-wheelers)?

  • avoid deep and opened drainage structures close to traffic lanes.

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

VERTICAL ALIGNMENT - DOWNHILL (continued)

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

Passing:          

Is passing clearly prohibited if unsafe (marking, median barrier)?

  • Compare available sight distances with required passing distances. Have site observations been completed without seeing hazardous passing manoeuvres?

Are passing opportunities sufficient on the road, based on road category and traffic conditions?

 

 

 

Combination of features:

Is the hill free of additional features that increase crash risk or severity, particularly if located at hill bottom (intersection, narrow bridge, etc.)?

 

 

 

VERTICAL ALIGNMENT - CURVES

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Hazardous manoeuvre:           

Have site observations been completed without seeing any hazardous manoeuvres at crest vertical curve?

  • hazardous passing manoeuvres, late braking, brake marks, avoidance manoeuvres, etc.

 

 

 

ROAD CHARACTERISTICS

 

 

 

Sight distance:            

Are sight distances sufficient to allow safe stopping manoeuvres (throughout the curve)?

  • compare available sight distances with required stopping distances. 
  • check for road hazards or sources of traffic conflicts where sight

is restricted (intersection, crossing, driveway, end of climbing lane, etc.).

 

 

 

Passing:          

Is passing clearly prohibited if unsafe (marking, median barrier)?

 

 

 

  • Compare available sight distances with required passing distances.
  • Have site observations been completed without seeing hazardous passing manoeuvres?

Are passing opportunities sufficient on the road, based on the road category and traffic conditions?

Climbing lane

Is the climbing lane ending safe?

  • taper length and location (sight distance).

 

 

 

Drainage (sag curve):

Is drainage capacity adapted to rainfall conditions?

  • water accumulation, erosion.

Are drainage structures safe for all road users (including two-wheelers)? Avoid deep and opened drainage structures close to traffic lanes.

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

SIGHT DISTANCE

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Speed:

Are operating speeds safe based on available sight distance?

 

 

 

Hazardous manoeuvre:

Have site observations been completed without seeing any hazardous manoeuvres that may be related to sight restrictions?

  • late braking, brake marks, avoidance manoeuvres, etc.

 

 

 

ROAD CHARACTERISTICS

 

 

 

Stopping sight stopping: 

Are sight distances sufficient to allow safe manoeuvres distance (throughout the site)?

  • compare available sight distances with required stopping distances. 
  • beware of seasonal or temporary sight obstructions that may not be present during the site visit (parked vehicle, crops, etc.).
  • check for sources of traffic conflicts or road hazards where sight is restricted; (intersection, crossing, driveway, narrow structure, etc.).

 

 

 

Overtaking sight distance:

Is passing clearly prohibited if unsafe (marking, median barrier)?

  • compare available sight distances with required passing distances. Have site observations been completed without seeing hazardous passing manoeuvres?

Are passing opportunities sufficient on the road, based on road category and traffic conditions?

 

 

 

Intersection sight distance:

Is the intersection obvious to all road users?

Are available sight distances sufficient to allow safe completion of all permitted manoeuvres?

  • compare available sight distances with manoeuvring sight distances.
  • check for visual obstructions at each intersection corner (horizontal curve, grade, building, stand, bridge, landscaping, pole, etc.). Beware of seasonal or temporary sight obstructions that may not be present during the site visit (parked vehicles, stopped bus, vegetation, etc.).

 

 

 

Decision sight distance:

Is the site free of any unusual, unexpected or complex situation that requires longer sight distances?

  • - first mandatory stop on a main road, unusual road layout or traffic rule, etc.

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

CROSS-SECTION

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Encroachment:

Have site observations been completed without seeing any hazardous encroachment?

 

 

 

ROAD CHARACTERISTICS

 

 

 

General:

Is the general aspect of the road section adequate given the road category and traffic conditions?

  • avoid narrow lanes on truck roads and wide roads in residential areas.

Have the needs of more vulnerable road users been adequately considered?

Are cross-section features consistent along the road?

  • If not, are drivers adequately warned of the transition? (warnings signs, taper features, marking).

 

 

 

Number of lanes: 

Is the number of lanes adequate, based on road category and traffic conditions?

  • Too many lanes (excessive speeds) or too few lanes (capacity problem).

Is each traffic lane clearly delimited by markings and/or channelization?

 

 

 

Lane width:

Are lane widths adequate for road category and traffic conditions?

  • too narrow or too wide.

Is the site free of hazardous lane width change?

  • e.g. sudden narrowing at bridge.

 

 

 

Auxiliary lane:

Are features of auxiliary lanes safe?

  • alignment, length, traffic management.
  • taper (length, location, sight distance).

 

 

 

Shoulder:

  • Do shoulders allow safe recovery of errant vehicles?
  • lane/shoulder drop off, shoulder width, surface material, stability, erosion, obstacles (trees, etc.).

 

 

 

Channelization (median separation, traffic island, etc.):

Does the existing channelization help improve the safety of road users?

  • clear delineation of each travel path.
  • reduction in traffic conflicts (separation of opposing, crossing, turning manoeuvres).

Are channelization features safe for all road users (motorized and non-motorized)?

  • - alignment, height of curbs, end treatment, etc.

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

CROSS-SECTION (continued)

YES

NO

COMMENTS

Drainage:         

Do crown and cross slope allow adequate water runoff?

Is drainage capacity adapted to rainfall conditions?

  • water accumulation, road erosion.

Are drainage structures safe for all road users, including two-wheelers?

  • avoid deep and open drainage structures close to traffic lanes.

 

 

 

Parking:           

Are parking facilities compatible with safe traffic operations?

  • avoid parking manoeuvres on high-speed roads.
  • check that parking does not impede visibility of crossing pedestrians and vehicles.

 

 

 

ROAD SURFACE CONDITION

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Hazardous manoeuvre:

Have site observations been completed without seeing any hazardous

manoeuvres that may be related to road surface deficiencies?

  • skidding (or skid marks), traffic conflict, unsafe lateral position.

 

 

 

ROAD CHARACTERISTICS

 

 

 

Skid resistance: 

Is the road surface’s skid resistance adequate, particularly at locations where friction requirement is high, such as in horizontal curves, in downhill grades and at intersections?

  • surface polishing, bleeding, contamination.
  • friction tests (if needed).

 

 

 

Evenness:        

Is the road surface’s evenness adequate?

  • - potholes, waves, rutting, etc.

 

 

 

ROAD SURFACE MARKING

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Travelling path  Are paths followed by road users safe?

 

 

 

ROAD CHARACTERISTICS

 

 

 

General:           

Does the marking comply with standards?

  • centreline, edgeline, laneline, audible marking/rumble strips.
  • crossings (pedestrians, cyclists, animals, trains, other).
  • marking width, length, colour, location, alignment.

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

ROAD SURFACE

MARKING (continued)

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

General: (continued)

Is the location of each lane and travelling path clearly delimited by marking and channelization?

  • avoid wide roads with inadequate marking that create confusion

as to the number of travel lanes and location of each of them.

Is the marking clearly visible under all conditions?

  • night, sunrise and sunset, rain, winter, etc.

Has possible confusion been avoided?

  • between permanent and temporary markings.
  • between old and new markings.

 

 

 

ROADSIDE

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

General:

In the required clearance zone, are roadsides free of features that may increase the severity of losses of control?

  • steep side slopes.
  • rigid obstacles (trees, poles, rocks, etc.).
  • inadequate end treatment of rigid structures (bridges, guardrails, drainage structures, etc.).

Are guardrails in good condition?

Is roadside equipment free of damage that may have been caused by errant vehicles?

Are roadsides free of features or activities that may distract drivers (commercial signs, stands, etc.)?

 

 

 

ACCESS

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Traffic conflict:

Have site observations been completed without seeing any traffic conflict related to the presence of road accesses?

 

 

 

ROAD CHARACTERISTICS

 

 

 

Density and type:

Are access density and type compatible with safe traffic operations (based on road category and traffic conditions)?

  • - keep the number of accesses low on mobility roads.

 

 

 

Location and geometry:

Are the locations and geometry of road accesses safe?

  • avoid accesses where driving workload is high (in the vicinity of intersections, curves, etc.).
  • avoid too-narrow or too-wide accesses.
  • if necessary, provide channelization to minimize traffic conflicts (splitter island, median separation, entrance or exit lane, etc.).

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

ACCESS (continued)

YES

NO

COMMENTS

Sight distance:

Is sight distance adequate at each road access?

  • road users entering or leaving accesses must be clearly visible to through traffic (and vice versa).
  • beware of seasonal or temporary sight obstructions (e.g. street parking).

Check for competing information.

 

 

 

ROAD SIGNS

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Compliance: Are drivers complying with road sign rules?

  • stop, speed, red light, etc.

Driver error: Have site observations been completed without seeing any driver error or hazardous behaviour that may result from inadequate signing?

  • late braking, hesitation, etc.

 

 

 

ROAD CHARACTERISTICS

 

 

 

General:           

Do existing road signs comply with standards?

  • missing or superfluous sign, material, size, location (height and lateral offset), message simplicity.

Are warning and guidance messages adapted to the road context? Is the site free of information overload (road signs and others)?

Are messages and traffic rules associated with road signs coherent along the road and on the road network?

Are sign supports adequately shielded or made frangible if required?

 

 

 

Visibility: Are sign visibility and conspicuity adequate?

Conspicuity:      

  • - beware of temporary or seasonal obstructions (parked vehicles, vegetation, etc.).
  • check for primacy of road signs over competing information (contrast, adjacent distractions).

Are road signs clearly visible under all conditions?

  • night, sun glare, winter (snow).

 

 

 

Maintenance: Are road signs in good condition?

  • - worn, broken, unclean, non-retro-reflective.

 

 

 

LIGHTING

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

General: Does the road lighting equipment comply with standards? Is the site free of hazardous lighting conditions at all times?

  • sunrise or sunset, winter, fog.
  • headlamp glare.

If not, have appropriate measures been taken to reduce the associated risk?

 

 

 

Maintenance: Are road lights functioning properly?

 

 

 

Protection: Are road poles adequately shielded or made frangible if required?

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

PEDESTRIANS/CYCLISTS

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Traffic conflict:

Have site observations been completed without seeing any traffic conflicts or hazardous manoeuvres involving pedestrians/cyclists?

 

 

 

ROAD CHARACTERISTICS

 

 

 

General:

Is the level of protection provided to pedestrians/cyclists appropriate for the road category and traffic conditions?

  • if high speeds, high volumes or heavy vehicles are involved:
  • pedestrians and cyclists should be separated from motorized vehicles (different paths).
  • crossings and turning manoeuvres should be separated in time (exclusive phases) or space (grade separated crossings).

 

 

 

Foot or bicycle path: Are the required pedestrian/cyclist facilities provided (based on existing norms)?

Is the continuity of pedestrian/cyclist facilities ensured along their itineraries?

Are the widths of foot/bicycle paths adequate for traffic volumes? Have adequate measures been taken to avoid illegal use of pedestrian and cyclist facilities?

  • parked vehicles, stands, other obstacles.

Are pedestrian/cyclist facilities adequate for night use? Is drainage capacity adequate?

  • water accumulation, erosion.
  • drainage structures that are hazardous to bicyclists.

Crossings

Are pedestrian or cyclist crossings provided if needed? Does their location suit the needs of these road users? Do pedestrian/bicycle crossings comply with standards?

  • type, width, signing.

Have safety fences been installed where necessary to guide pedestrians to crossings?

Are sight distances adequate?

  • drivers must clearly see pedestrians and cyclists (and vice versa).
  • beware of temporary or seasonal obstructions.

 

 

 

Road signs:

Are road signs warning drivers of the presence of pedestrians or cyclists?

  • near school, playground, etc.

 

 

 

Special road user:

Have the needs of all pedestrian categories been properly addressed?

  • baby carriages, children, elderly people, disabled persons, wheelchairs (e.g. low curbs, gentle slopes, handrails, etc.).

 

 

 

STEP 3 - SITE INSPECTIONS – ROAD SECTIONS

TRUCKS

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

Traffic conflict:

Have site observations been completed without seeing any traffic conflicts or hazardous manoeuvres involving trucks?

 

 

 

Speed differential:

Are speed differentials between cars and trucks compatible with safe traffic operations (downhill or uphill)?

 

 

 

 

Platoon:

Are vehicle platoons unlikely to form behind trucks (downhill or uphill)?

 

 

 

ROAD CHARACTERISTICS

 

 

 

General:

Is the presence of trucks coherent with road category and traffic conditions?

 

 

 

Lane width:

Are lane widths adequate for truck dimensions?

[road width ]

 

 

 

Horizontal and vertical alignment:

Are the features of the horizontal alignment adequate to prevent the risk of truck overturning?

[skidding speed ] [overturning speed ]

Are the features of the vertical alignment adequate to prevent the risk of brake overheating or excessive speed differentials (downhill and uphill)?

If not, are the required safety facilities available?

  • brake check area, arrester bed.
  • climbing lane.

 

 

 

Vertical clearance:

Is there adequate vertical clearance or proper signage of height restriction?

Sight distance

Sight distance Are available sight distances adequate for trucks to stop and complete all permitted manoeuvres safely?

  • beware of situations where the truck driver’s higher position cannot compensate for the increased stopping and manoeuvring distances (e.g. vertical structures).

 

 

 

ANIMALS

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

Road equipment: Are fencing and crossings provided where necessary?

 

 

 

Warning sign: Is signing adequate (cattle crossing, wild-animal warning, etc.)?

 

 

 

STEP 3 - SITE INSPECTIONS – INTERSECTIONS

INTERSECTIONS

YES

NO

COMMENTS

TRAFFIC OPERATIONS

 

 

 

General:

Have site observations been completed without seeing any hazardous traffic conditions?

  • excessive delays (motorized, non-motorized).
  • queues of vehicles.
  • hazardous manoeuvres (short gap acceptance).
  • poor compliance with traffic regulations (incomplete stop, red light running, no yield to pedestrians).
  • if needed, conduct a traffic count, delay study, capacity analysis.

 

 

 

Traffic control device:

Is the traffic control device appropriate for traffic conditions?

  • (None, yield, stop on minor legs, all-way stops, traffic signals).
  • is the timing of traffic signals appropriate (number and length of each phase, including clearance intervals)?

 

 

 

Traffic pattern:   Is the intersection free of unusual traffic patterns that may surprise drivers (e.g. change of main road direction)?

 

 

 

Travel path:

Are travel paths easy to identify?

 

 

 

Speed:

Are operating speeds adequate for road conditions?

 

 

 

Traffic conflict:

Have site observations been completed without seeing any obvious traffic conflict problem (motorized - motorized, motorized - non-motorized)

 

 

 

STEP 3 - SITE INSPECTIONS – INTERSECTIONS

INTERSECTIONS (continued)

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

Type of  intersection: Is the presence of this type of intersection (e.g. T, +, roundabout):

  • coherent with the road environment?
  • allowed by existing norms.

Is the density of intersections suited to the road category and traffic conditions?

 

 

 

Layout: Are intersection characteristics adequate for the road category and traffic conditions?

  • excessive intersection areas.
  • insufficient turning radii (encroachments of large vehicles);
  • unusual or complex intersection layouts (more than 4 legs, skewed, offset).

 

 

 

Sight distance: Is the intersection obvious to all road users?

Are available sight distances sufficient to allow safe stopping manoeuvres (throughout the intersection)?

  • compare available sight distances with required stopping distances
  • check sight distances at possible end of vehicle queues.

Are available sight distances sufficient to allow safe completion of all permitted manoeuvres?

  • compare available sight distances with manoeuvring distances.
  • check for visual obstructions at each intersection corner (horizontal curve, building, stand, bridge, landscaping, pole, etc.).
  • beware of seasonal or temporary sight obstructions that may not be present during the site visit (parked vehicles, stopped bus, seasonal vegetation, etc.).

 

 

 

Horizontal and vertical alignment: Is the intersection free of horizontal curve or grade that may reduce visibility and increase manoeuvring difficulties?

 

 

 

Lane: Is the number of lanes adequate for the road category and traffic conditions?

  • too many or too few lanes.

Have turning lanes been provided if required? Are turning lane characteristics safe?

  • advance warning of turning lane.
  • sufficient length to avoid blockage of through lanes.
  • tapers (length, alignment).

Is the continuity of each lane provided before and after the intersection? Are lane widths adequate? too narrow or too wide. 

  • Is each traffic lane clearly delimited (marking and/or channelization)?

 

 

 

Channelization: Does the existing channelization improve the safety of all road users?

  • clear delineation of each travel path (e.g. traffic island to separate conflicting manoeuvres, median refuge, etc.).

Are the channelization features safe for all road users?

  • channelization alignment, height of curbs, end treatments, etc.

 

 

 

STEP 3 - SITE INSPECTIONS – INTERSECTIONS

INTERSECTIONS (continued)

YES

NO

COMMENTS

Drainage: Is drainage capacity adapted to rainfall conditions?

  • water accumulation, road erosion.

Are drainage structures safe for all road users, including two-wheelers?

  • avoid deep and open drainage structures close to traffic lanes.

 

 

 

Surface condition: Is skid resistance adequate?

  • surface polishing, bleeding, contamination.
  • friction tests (if needed). Is surface evenness adequate?
  • potholes, waves, rutting, etc.

Is the road surface free of water (or traces thereof)?

Is the road surface free of loose material (sand, rocks, leaves, etc.)?

 

 

 

Roadsides: In the required clearance zone, are roadsides free of features that may increase the severity of losses of control?

  • steep side slopes.
  • rigid obstacles (trees, poles, rocks, etc.).
  • inadequate end treatment of rigid structures (bridges, barriers, drainage structures, etc.).
  • rigid obstacles in front of T intersections.

Are safety barriers in good condition?

Is roadside equipment free of damage that may have been caused by errant vehicles?

Are roadsides free of features or activities that may cause excessive distraction (e.g. commercial signs)?

 

 

 

Access : Are the locations and geometry of road accesses safe?

  • avoid road accesses in intersection corners.
  • avoid too-narrow or too-wide accesses.
  • if necessary, provide channelization to minimize traffic conflicts (splitter island, median barrier, entrance or exit lane, etc.).

 

 

 

Road signs Traffic signals: Do the intersection road signs and comply with standards?        

  • missing or superfluous equipment, size, location (height and signals                        lateral offset).
  • check location of stop sign(s).

Is the warning level well-suited to the situation?

  • check whether advance warnings are required (e.g. first mandatory stop after several kilometres, end of high-speed road)?

Are the visibility and conspicuity of signs and signals adequate?

  • beware of seasonal or temporary sight obstructions (parked or stopped vehicles, vegetation, etc.).
  • beware of situations that reduce signal lenses visibility and require special treatments (shield, special type of light).

Are signs/devices/signals in good condition?

  • worn, broken, unclean, non-retro reflective. 

Are poles shielded or made frangible if needed?

 

 

 

INTERSECTIONS (continued)

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

Marking: Does the marking comply with standards?

  • centreline, edgeline, laneline, stop line.
  • crossings (pedestrians, cyclists, others).
  • marking width, length, colour, location, alignment.

Is the location of each lane and travelling path clearly delimited by marking and channelization?

Are resulting lane and shoulder widths adequate for road category and traffic conditions?

Is the marking clearly visible under all conditions?

  • night, sunrise and sunset, rain, winter, etc.

Has possible confusion been avoided?

  • between permanent and temporary markings.
  • between old and new markings.

 

 

 

Road lighting: Does the road lighting equipment comply with standards?

Are road lights functioning properly?

Are road lighting poles adequately shielded or made frangible if required (high-speed roads)?

Is the intersection free of hazardous lighting conditions at all times?

  • - sunrise or sunset, winter, fog.

If not, have adequate measures been taken to reduce the risk?

 

 

 

Hazardous: Is the intersection free of nearby features that increase crash combination risk or severity (horizontal or vertical curve, railroad crossing, of features bridge, etc)?

 

 

 

Pedestrian: Are pedestrian or cyclist crossings provided if needed? Does their location suit the needs of these road users?

Is the level of protection provided to pedestrians appropriate for the road category and traffic conditions?

  • if high speeds, high volumes or heavy vehicles are involved, crossing manoeuvres should be separated in time (exclusive phase) or in space (grade-separated crossing).

Do the pedestrian/bicycle crossings comply with standards?

  • location, type, width, signing.

Have safety fences been installed where necessary to guide pedestrians to crossings?

Are sight distances adequate?

  • vehicles must be able to see pedestrians/cyclists and vice versa.
  • beware of temporary or seasonal obstructions. Have median refuges been provided where required?

 

 

 

INTERSECTIONS (continued)

YES

NO

COMMENTS

ROAD CHARACTERISTICS

 

 

 

Pedestrian:

Have the needs of all pedestrians been properly addressed?

  • baby carriages, children, elderly people, disabled persons, wheelchairs, (e.g. low curbs, gentle slopes, handrails, etc).

Are there adequate road signs warning drivers of the presence of pedestrians?

Are pedestrian facilities adequate for night use?

Traffic signals

Does the signal timing provide adequate protection to pedestrians and cyclists?

  • exclusive phase if required, adequate phase length and sequence (pedestrian/cyclist must phase follows the main phase).

Are pedestrian signal heads clearly visible?

 

 

 

Truck: Are turning radii appropriate for heavy vehicle characteristics?

  • encroachments.

Are sight distances adequate for safe truck manoeuvring?

Are acceleration/deceleration lane features adequate for heavy-vehicle characteristics and performance?

  • length, width, tapers

 

 

 

Bus: Are existing bus facilities compatible with safe traffic operations?

  • is there sufficient protection for bus users entering or leaving bus?
  • does the presence of a bus shelter or a stopped bus impede visibility?

Check suitability of bus stops in reducing pedestrian crossings and related traffic conflicts.

 

 

 

ADDITIONAL DATA COLLECTION

ELEMENTSOKCOMMENTS
Pictures

 
Videos

 
Condition diagram

 
Others

 

OPTIONAL DATA (depending on study needs)

ELEMENTSOKCOMMENTS
Traffic count

 
Traffic conflicts

 
Spot speed

 
Travel time and delay

 
Sight distances

 
Traffic signal timing