APPENDIX 10.4 - CHECKLISTS
SAFETY DIAGNOSIS CHECKLISTS
Municipality: Location: Date: Analyst: Analysis objectives:
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STEP 1 - GATHER RELEVANT INFORMATION
ELEMENT | OK | COMMENTS | |
Data | Crash | ☐ |
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Traffic | ☐ |
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Geometry | ☐ |
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Conclusions of previous studies (safety, sight distance, spot speed, skid resistance, etc.) | ☐ |
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Maintenance reports | ☐ |
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Photos/videos | ☐ |
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Employees’ knowledge | ☐ |
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Requests/complaints/discussions (road users, local residents local government officials) | ☐ |
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Others | ☐ |
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Conclusions:
STEP 2 – ANALYSE DATA
TASK | OK | COMMENTS |
Select crash period and retrieve data from to
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Prepare crashes summaries frequency diagram factor matrix collision diagram. | ☐ ☐ ☐ |
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Calculate safety indicators (Section 10.3 _ criteria for selecting locations to investigate for treatment) |
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Determine abnormal crash patterns |
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Search for crash factors (to be completed at the site) |
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STEP 3 - SITE INSPECTIONS – PREPARATION
Gather the following items:
ITEM | OK |
In all studies:
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According to study requirements:
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For the analysts’ safety:
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STEP 3 - SITE INSPECTIONS – FAMILIARIZATION
TASKS | OK | COMMENTS | |||||||
Travel through the site in all directions and note obvious problems:
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Verify the overall coherence of the road environment based on: | ☐
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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
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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:
Overload possibilities
Drowsiness or inattention possibilities |
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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 |
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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?
(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 |
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Speed: Are observed speeds in curve safe?
Is the speed reduction required in the approach to the curve compatible with safe traffic operations? |
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Braking: Are braking manoeuvres safely performed?
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Encroachment: Have site observations been completed without seeing hazardous encroachment? |
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ROAD CHARACTERISTICS |
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Curve radius: Is the curve radius adequate for the road category and traffic conditions?
Is the risk of overturning low? |
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Lane width: Are lane widths sufficient for safe traffic operation? road width |
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Shoulder: Do shoulders allow the safe recovery of errant vehicles?
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Surface condition: Is the skid resistance adequate?
Is the evenness adequate?
Is the road surface free of water (or traces thereof)? Is the road surface free of loose material (sand, rocks, leaves, etc.)? |
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Superelevation: Is superelevation adequate?
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Roadside condition: In the required clearance zone, are roadsides free of features that may increase crash severity?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
HORIZONTAL | ALIGNMENT (continued) | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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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.)? |
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Sight distance: Is the road alignment obvious?
curve after a crest vertical curve, etc.). Are the available sight distances sufficient to allow safe stopping manoeuvres (throughout the curve)?
Are roadsides on curve interior free of features that may impede visibility?
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Overtaking: Is overtaking clearly prohibited if unsafe (marking, median barrier)?
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? |
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Warning sign/device: Do warning signs/devices comply with standards?
Is the warning level well-suited to the situation?
Are the visibility and conspicuity of warning signs and devices adequate? Are warning signs/devices in good condition?
Are sign supports adequately shielded or made frangible if required? |
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Combination of features: Is the horizontal curve free of additional features that may increase crash severity?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
VERTICAL ALIGNMENT - DOWNHILL | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Speed:
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Braking: If braking manoeuvres are required, are they safely completed (at intersection, access)?
Platoon: Are vehicles platoons unlikely to form?
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ROAD CHARACTERISTICS |
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Grade percentage and length: Are grade percentages and lengths unlikely to cause safety problems?
Are drivers likely to expect the grade features?
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Warning signs/device: Do warning signs/devices comply with standards?
Is the warning level well-suited to the situation?
Are the visibility and conspicuity of signs/devices adequate? Are warning signs/devices in good condition?
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Safety facility check brake area arrested bed: Are the required safety facilities available at the site?
Are features of the safety facilities adequate?
Are the safety facilities well maintained? |
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Surface condition: Is the skid resistance adequate?
Is road surface’s evenness adequate?
Is the road surface free of loose material (sand, rocks, leaves, etc.)? |
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Drainage: Are drainage facilities adapted to rainfall conditions?
Are drainage structures safe for all road users (including two-wheelers)?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
VERTICAL ALIGNMENT - DOWNHILL (continued) | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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Passing: Is passing clearly prohibited if unsafe (marking, median barrier)?
Are passing opportunities sufficient on the road, based on road category and traffic conditions? |
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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.)? |
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VERTICAL ALIGNMENT - CURVES | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Hazardous manoeuvre: Have site observations been completed without seeing any hazardous manoeuvres at crest vertical curve?
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ROAD CHARACTERISTICS |
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Sight distance: Are sight distances sufficient to allow safe stopping manoeuvres (throughout the curve)?
is restricted (intersection, crossing, driveway, end of climbing lane, etc.). |
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Passing: Is passing clearly prohibited if unsafe (marking, median barrier)? |
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Are passing opportunities sufficient on the road, based on the road category and traffic conditions? Climbing lane Is the climbing lane ending safe?
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Drainage (sag curve): Is drainage capacity adapted to rainfall conditions?
Are drainage structures safe for all road users (including two-wheelers)? Avoid deep and opened drainage structures close to traffic lanes. |
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
SIGHT DISTANCE | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Speed: Are operating speeds safe based on available sight distance? |
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Hazardous manoeuvre: Have site observations been completed without seeing any hazardous manoeuvres that may be related to sight restrictions?
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ROAD CHARACTERISTICS |
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Stopping sight stopping: Are sight distances sufficient to allow safe manoeuvres distance (throughout the site)?
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Overtaking sight distance: Is passing clearly prohibited if unsafe (marking, median barrier)?
Are passing opportunities sufficient on the road, based on road category and traffic conditions? |
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Intersection sight distance: Is the intersection obvious to all road users? Are available sight distances sufficient to allow safe completion of all permitted manoeuvres?
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Decision sight distance: Is the site free of any unusual, unexpected or complex situation that requires longer sight distances?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
CROSS-SECTION | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Encroachment: Have site observations been completed without seeing any hazardous encroachment? |
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ROAD CHARACTERISTICS |
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General: Is the general aspect of the road section adequate given the road category and traffic conditions?
Have the needs of more vulnerable road users been adequately considered? Are cross-section features consistent along the road?
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Number of lanes: Is the number of lanes adequate, based on road category and traffic conditions?
Is each traffic lane clearly delimited by markings and/or channelization? |
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Lane width: Are lane widths adequate for road category and traffic conditions?
Is the site free of hazardous lane width change?
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Auxiliary lane: Are features of auxiliary lanes safe?
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Shoulder:
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Channelization (median separation, traffic island, etc.): Does the existing channelization help improve the safety of road users?
Are channelization features safe for all road users (motorized and non-motorized)?
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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?
Are drainage structures safe for all road users, including two-wheelers?
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Parking: Are parking facilities compatible with safe traffic operations?
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ROAD SURFACE CONDITION | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Hazardous manoeuvre: Have site observations been completed without seeing any hazardous manoeuvres that may be related to road surface deficiencies?
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ROAD CHARACTERISTICS |
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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?
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Evenness: Is the road surface’s evenness adequate?
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ROAD SURFACE MARKING | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Travelling path Are paths followed by road users safe? |
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ROAD CHARACTERISTICS |
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General: Does the marking comply with standards?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
ROAD SURFACE | MARKING (continued) | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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General: (continued) Is the location of each lane and travelling path clearly delimited by marking and channelization?
as to the number of travel lanes and location of each of them. Is the marking clearly visible under all conditions?
Has possible confusion been avoided?
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ROADSIDE | YES | NO | COMMENTS | |
ROAD CHARACTERISTICS |
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General: In the required clearance zone, are roadsides free of features that may increase the severity of losses of control?
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.)? |
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ACCESS | YES | NO | COMMENTS | |
TRAFFIC OPERATIONS |
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Traffic conflict: Have site observations been completed without seeing any traffic conflict related to the presence of road accesses? |
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ROAD CHARACTERISTICS |
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Density and type: Are access density and type compatible with safe traffic operations (based on road category and traffic conditions)?
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Location and geometry: Are the locations and geometry of road accesses safe?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
ACCESS (continued) | YES | NO | COMMENTS |
Sight distance: Is sight distance adequate at each road access?
Check for competing information. |
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ROAD SIGNS | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Compliance: Are drivers complying with road sign rules?
Driver error: Have site observations been completed without seeing any driver error or hazardous behaviour that may result from inadequate signing?
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ROAD CHARACTERISTICS |
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General: Do existing road signs comply with standards?
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? |
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Visibility: Are sign visibility and conspicuity adequate? Conspicuity:
Are road signs clearly visible under all conditions?
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Maintenance: Are road signs in good condition?
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LIGHTING | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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General: Does the road lighting equipment comply with standards? Is the site free of hazardous lighting conditions at all times?
If not, have appropriate measures been taken to reduce the associated risk? |
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Maintenance: Are road lights functioning properly? |
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Protection: Are road poles adequately shielded or made frangible if required? |
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
PEDESTRIANS/CYCLISTS | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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Traffic conflict: Have site observations been completed without seeing any traffic conflicts or hazardous manoeuvres involving pedestrians/cyclists? |
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ROAD CHARACTERISTICS |
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General: Is the level of protection provided to pedestrians/cyclists appropriate for the road category and traffic conditions?
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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?
Are pedestrian/cyclist facilities adequate for night use? Is drainage capacity adequate?
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?
Have safety fences been installed where necessary to guide pedestrians to crossings? Are sight distances adequate?
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Road signs: Are road signs warning drivers of the presence of pedestrians or cyclists?
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Special road user: Have the needs of all pedestrian categories been properly addressed?
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STEP 3 - SITE INSPECTIONS – ROAD SECTIONS
STEP 3 - SITE INSPECTIONS – INTERSECTIONS
INTERSECTIONS | YES | NO | COMMENTS |
TRAFFIC OPERATIONS |
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General: Have site observations been completed without seeing any hazardous traffic conditions?
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Traffic control device: Is the traffic control device appropriate for traffic conditions?
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Traffic pattern: Is the intersection free of unusual traffic patterns that may surprise drivers (e.g. change of main road direction)? |
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Travel path: Are travel paths easy to identify? |
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Speed: Are operating speeds adequate for road conditions?
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Traffic conflict: Have site observations been completed without seeing any obvious traffic conflict problem (motorized - motorized, motorized - non-motorized)
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STEP 3 - SITE INSPECTIONS – INTERSECTIONS
INTERSECTIONS (continued) | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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Type of intersection: Is the presence of this type of intersection (e.g. T, +, roundabout):
Is the density of intersections suited to the road category and traffic conditions? |
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Layout: Are intersection characteristics adequate for the road category and traffic conditions?
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Sight distance: Is the intersection obvious to all road users? Are available sight distances sufficient to allow safe stopping manoeuvres (throughout the intersection)?
Are available sight distances sufficient to allow safe completion of all permitted manoeuvres?
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Horizontal and vertical alignment: Is the intersection free of horizontal curve or grade that may reduce visibility and increase manoeuvring difficulties? |
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Lane: Is the number of lanes adequate for the road category and traffic conditions?
Have turning lanes been provided if required? Are turning lane characteristics safe?
Is the continuity of each lane provided before and after the intersection? Are lane widths adequate? too narrow or too wide.
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Channelization: Does the existing channelization improve the safety of all road users?
Are the channelization features safe for all road users?
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STEP 3 - SITE INSPECTIONS – INTERSECTIONS
INTERSECTIONS (continued) | YES | NO | COMMENTS |
Drainage: Is drainage capacity adapted to rainfall conditions?
Are drainage structures safe for all road users, including two-wheelers?
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Surface condition: Is skid resistance adequate?
Is the road surface free of water (or traces thereof)? Is the road surface free of loose material (sand, rocks, leaves, etc.)? |
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Roadsides: In the required clearance zone, are roadsides free of features that may increase the severity of losses of control?
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)? |
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Access : Are the locations and geometry of road accesses safe?
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Road signs Traffic signals: Do the intersection road signs and comply with standards?
Is the warning level well-suited to the situation?
Are the visibility and conspicuity of signs and signals adequate?
Are signs/devices/signals in good condition?
Are poles shielded or made frangible if needed? |
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INTERSECTIONS (continued) | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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Marking: Does the marking comply with standards?
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?
Has possible confusion been avoided?
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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?
If not, have adequate measures been taken to reduce the risk? |
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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)? |
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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?
Do the pedestrian/bicycle crossings comply with standards?
Have safety fences been installed where necessary to guide pedestrians to crossings? Are sight distances adequate?
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INTERSECTIONS (continued) | YES | NO | COMMENTS |
ROAD CHARACTERISTICS |
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Pedestrian: Have the needs of all pedestrians been properly addressed?
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?
Are pedestrian signal heads clearly visible? |
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Truck: Are turning radii appropriate for heavy vehicle characteristics?
Are sight distances adequate for safe truck manoeuvring? Are acceleration/deceleration lane features adequate for heavy-vehicle characteristics and performance?
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Bus: Are existing bus facilities compatible with safe traffic operations?
Check suitability of bus stops in reducing pedestrian crossings and related traffic conflicts. |
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ADDITIONAL DATA COLLECTION
ELEMENTS | OK | COMMENTS |
Pictures | ☐ | |
Videos | ☐ | |
Condition diagram | ☐ | |
Others | ☐ |
OPTIONAL DATA (depending on study needs)
ELEMENTS | OK | COMMENTS |
Traffic count | ☐ | |
Traffic conflicts | ☐ | |
Spot speed | ☐ | |
Travel time and delay | ☐ | |
Sight distances | ☐ | |
Traffic signal timing | ☐ |