Safe Streets Arlington Plan Safe Streets Arlington Plan | Page 119

INTERSECTIONS & ROADWAYS INTERSECTIONS & ROADWAYS

When a vehicle leaves the traveled way and encounters a pavement-shoulder drop-off , it can be difficult for the driver to return safely to the roadway . A safety edge is a treatment intended to minimize the severity of roadway or lane departure crashes . With this treatment , the shoulder pavement edge is sloped at an angle ( 30-35 degrees ) to make it easier for a driver to safely reenter the roadway after inadvertently driving onto the shoulder . This treatment could be incorporated as a standard practice in overlay or roadway resurfacing projects .

Traffic signals at intersections control the flow of traffic by assigning right-of-way to different movements at different times . Some traffic signal phasing is more effective at reducing the likelihood of severe injury collisions . For example , protected left-turn signal phasing reduces the likelihood of severe left-turn collisions more effectively than permitted leftturn signal phasing .

Cost $$$

Cost $

Relevant Crash Types Run Off Road

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Relevant Crash Types Left Turns at Unsignalized Intersections Angled Crashes at Signalized Intersections Angled Crashes at Unsignalized Intersections Pedestrians at Unsignalized Intersections Bicyclists at Signalized Intersections

APPENDIX B : COUNTERMEASURES TOOLBOX B-20