FHWA: Making Our Roads Safer One Countermeasure at a Time

http://safety.fhwa.dot.gov https://safety.fhwa.dot.gov/ provencountermeasures. INTERSECTIONS | PROVEN SAFETY COUNTERMEASURES Access management refers to the design, application, and control of entry and exit points along a roadway. This includes intersections with other roads and driveways that serve adjacent properties. Thoughtful access management along a corridor can simultaneously enhance safety for all modes, facilitate walking and biking, and reduce trip delay and congestion. Every intersection, from a signalized intersection to an unpaved driveway, has the potential for conflicts between vehicles, pedestrians, and bicycles. The number and types of conflict points— locations where the travel paths of two users intersect—influence the safety performance of the intersection or driveway. The following access management strategies can be used individually or in combination with one another: Driveway closure, consolidation, or relocation. Limited-movement designs for driveways (such as right-in/right-out only). Raised medians that preclude across-roadway movements. Intersection designs such as roundabouts or those with reduced lef- turn-conflicts (such as J-turns, median U-turns, etc.). Turn lanes (i.e., lef-only, right-only, or interior two-way lef). Lower speed one-way or two-way of-arterial circulation roads. Successful corridor access management involves balancing overall safety and corridor mobility for all users along with the access needs of adjacent land uses. A raised median reduces conflict points along this roadway. Source: Missouri DOT Use of roundabouts, raised median, and right-in/right-out driveways can be an efective access management plan. Source: FHWA-SA-15-005 7. Corridor Access Management SAFETY BENEFITS: Source: FHWA This intersection design restricts lef-turn movements to improve safety. 5-23% Reduction in total crashes along 2-lane rural roads 25-31% Reduction in injury and fatal crashes along urban/ suburban arterials Source: Highway Safety Manual