10.2 Acceptable Gap Distance Motorists turning from a minor road onto a major road will not make a turn until they observe an adequate gap in traffic on the major road. Acceptable gap distance is the size of gap that provides motorists enough time to stop and complete...
10.6 Left-Turn Lanes at Non-Signalized Intersections Dedicated left-turn lanes at non-signalized intersections improve traffic flow and safety by removing left-turning vehicles from the through lane and providing space where they can decelerate await an acceptable gap...
10.8 Sight Distance at Left-Skewed Intersections When a vehicle crosses a major road from a left-skewed minor road, the motorist’s line of sight is obstructed by portions of their vehicle (e.g., roof posts, door frames). AASHTO recommends that intersection skew not...
30.12 Roundabout Lighting Lighting is an essential navigational aid and should be used at every roundabout so motorists can safely drive them at night and other periods of low visibility. Partial lighting is better than no lighting. In areas where installing a power...
30.10 Countermeasures for Improving Accessibility for Vision-Impaired Pedestrians at Roundabouts Compared to pedestrians with no vision impairments, pedestrians who have vision impairments typically have longer wait times at roundabouts because they are unable to take...
30.8 Accommodations for Bicyclists at Roundabouts Roundabouts have lower crash rates than conventional intersections, but they can see more bicycle crashes than four-legged intersections. Applying one or more of the following countermeasures will enhance bicyclist...
