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Pages 16-17

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From page 16...
... Similarly, treatments that may have a small effect on total crashes may require a relatively large sample of sites to conduct a cost-effective evaluation. Based on these criteria and on the available budget, three treatments were identified for evaluation: • Adding protection for left-turning vehicles which includes the following treatments: – Introduce protected left-turn phasing.
From page 17...
... for which there appeared to be a research need coupled with the availability of data for a substantial number of treatment sites. The following is the final list of treatments that were evaluated in this study: • Install Dynamic Advanced Warning Flashers, • Convert Signalized Intersections to Roundabouts, • Change Clearance Intervals, • Change Left-Turn Phasing, and • Introduction of Flashing Yellow Arrow.

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