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- W283294334 abstract "SUMMARY AND CONCLUSIONS Signalization is used to enhance the operational efficiency of roundabouts where pedestrian traffic causes unacceptable vehicle delay and where the volume of traffic from one entry is so high as to cause unacceptable queues at downstream entries. No evidence was identified to suggest that a properly designed signal system would degrade roundabout traffic operations. When traffic signals are installed that stop both entry and exit traffic at the same time while pedestrians cross both directions of traffic, queues back up into the circulating roadway and disrupt traffic operations. Stopping both directions of traffic at the same time is generally not done outside the U.S. The only study identified that addressed the effect of signalization on roundabout safety showed a marked improvement in safety for vehicles and bicyclists, with no degradation in pedestrian safety. Solar powered traffic signals that operate only when called by pedestrians could be installed at four legs of a multilane roundabout for about $140,000. The actual cost could be less, if fewer than four signal faces are used at each crossing. Additionally, if pedestrian traffic is unbalanced, then crosswalks can be omitted from some legs and substantial signalization cost reductions can obtain. It should be not Additional research is needed to support signal implementations that do not meet current MUTCD standards. This includes research into the effects of using two-lens amber-red 25" @default.
- W283294334 created "2016-06-24" @default.
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- W283294334 date "2007-01-11" @default.
- W283294334 modified "2023-09-27" @default.
- W283294334 title "Synthesis of Literature Relevant to Roundabout Signalization to Provide Pedestrian Access" @default.
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