Roundabout Practices (2016) / Chapter Skim
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Pages 76-83
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From page 76... ...
76 APPENDIX D Case Examples California (Caltrans) Roundabout Selection • Caltrans uses an Intersection Control Evaluation (ICE)
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77 eliminating the ability for drivers to cross over lanes and taking the fastest path through the roundabout. • ConnDOT is starting to question the traffic volume projections, and instead making the roundabout work for ten years.
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78 • GDOT uses a ten year window for considering a phased approach. • GDOT prefers opening roundabouts as a single-lane roundabout.
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79 • Partially because of recent experience with a multilane roundabout in Emporia, Kansas, multilane roundabouts are not viewed as favorable at the moment. Modifications to Existing Roundabouts • A multilane roundabout in Emporia, Kansas was reconfigured to a single lane roundabout.
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80 • In particular, Maryland did not understand the potential for path overlap at multilane roundabouts, and has attempted to restripe or reduce the number of entering lanes to correct the issue. Roundabout Cost • All roundabouts in Maryland now have curb and gutter and illumination.
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81 typically property damage only (PDO) and modification involved reducing entry capacity.
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Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America's Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012)
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TRANSPORTATION RESEARCH BOARD 5 0 0 F ifth S tre e t, N W W a s h in g to n , D C 2 0 0 0 1 A D D R ESS SER VICE R EQ UESTED NO N-PRO FIT O RG .
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