Protected Left Turns
Retroreflective Tape on Signals
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SIGNALS
Protected Left Turns
A protected left turn can be implemented at signalized intersections ( with existing left turns pockets ) that currently have a permissive left-turn or no left-turn protection . Providing protected left-turn phases for signalized intersections removes the need for the drivers to navigate through gaps in oncoming / opposing through vehicles .
Cost $$
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SIGNALS
Retroreflective Tape on Signals
Retroreflective borders enhance the visibility of traffic signals for aging and color-visionimpaired drivers , enabling them to understand which signal indication is illuminated . Retroreflective borders may also alert drivers to signalized intersections during periods of power outages when the signals would otherwise be dark and non – reflective signal heads and backplates would not be visible .
Cost $
Low Cost / Quick Build alternative available
Relevant Crash Types Left Turns at Signalized Intersections Pedestrians at Signalized Intersections
Safe System Hierarchy |
Tier 1 |
Tier 2 |
Tier 3 |
Tier 4 |
Remove Severe Conflicts |
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Manage Conflicts in Time |
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Relevant Crash Types Nighttime Angled Crashes at Signalized Intersections
Safe System Hierarchy |
Tier 1 |
Tier 2 |
Tier 3 |
Tier 4 |
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Increase Attentiveness and Awareness |
APPENDIX B : COUNTERMEASURES TOOLBOX B-34