Road Function, Classification, Environment
Road Alignment and Cross Section
- Visibility, sight distance
- Design speed
- Speed limit/speed zoning
- Passing
- ‘Readability’ (perception) of the alignment by drivers
- Human factors
- Widths
- Shoulders
- Cross slopes
- Side slopes
- Drains
- Combinations of features
Auxiliary Lanes
- Tapers
- Shoulders
- Signs and markings
- Turning traffic
Intersections
- Location
- Visibility, sight distance
- Signing and marking
- Layout and ‘readability’ (perception) by drivers
- Pedestrians, bicyclists
- Lighting
Interchanges
- Visibility, sight distance
- Lanes, shoulders
- Signing, marking, delineation
- Pedestrians, bicyclists
- Lighting
Signs and Lighting
- Lighting
- General signs issues
- Sign legibility
- Sign supports
Marking and Delineation
- General issues
- Centerlines, edgelines, lane lines
- Guideposts and reflectors
- Curve warning and delineation
Barriers and Clear Zones
- Clear zones
- Barriers
- End treatments /Crash cushions
- Pedestrian railing
- Visibility of barriers and fences
Traffic Signals
- Operations
- Visibility
- Placement of signal heads
Pedestrians and Bicyclists
- General issues
- Pedestrians
- Bicyclists
- Public transport
Older Drivers
- Turning operations (receiving lane widths, radii)
- Channelization, opposing left turn lanes
- Sight triangles
- Signing, marking and delineation
- Traffic signals
Bridges and Culverts
- Design features
- Barriers
- Pedestrian and recreational facilities, delineation
Pavement
- Pavement defects
- Skid resistance
- Ponding/icing/snow accumulation
- Loose stones/material
- Manholes
Parking
Provision For Heavy Vehicles
- Design issues
- Pavement/shoulder quality
Floodways and Causeways
- Ponding and flooding
- Safety of devices
Other Safety Issues
- Landscaping
- Temporary works
- Headlight glare
- Roadside activities
- Signs of possible problems (pavement, roadside)
- Rest areas
- Environment
- Median curbing