Turbo Roundabouts: Support Safety, Efficiency, and Increased Capacity

Details

• Corporate Creators:
  United States. Federal Highway Administration. Office of International Programs
• Subject/TRT Terms:
  Cooperation Highway Capacity International Relations Roundabouts Traffic Safety
• Resource Type:
  Brief
• Right Statement:
  Public Domain
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Highway Administration. Office of International Programs
• Abstract:
  The turbo roundabout was invented in the Netherlands in 1996, with the initial design guidelines developed by the Dutch Information and Technology Platform. The term “turbo” is descriptive of the spiral geometry utilized and not the speed of cars traveling through the roundabout (see figure 1). In fact, speeds are significantly reduced in a turbo roundabout. Through collaborative work with the Netherlands, the Federal Highway Administration (FHWA) developed the Advancing Turbo Roundabouts in the United States: Synthesis Report. The document reviews existing published resources (e.g., reports, papers, presentations, videos, and tools) on the topic of turbo roundabouts from international and domestic sources. The synthesis has three major sections: 1) geometric design, 2) capacity and operational performance, and 3) safety performance. The synthesis provides specifics regarding the treatment of various users, including motorists, pedestrians, cyclists, heavy vehicles, and motorcyclists. The synthesis also includes information on education and public outreach approaches targeting non-technical audiences. After more than a decade of promotion by various organizations, the first operational turbo roundabout in the United States has been built in Jacksonville, Florida. FHWA is helping guide the implementation of turbo roundabouts in the United States in several ways, including publications such as the synthesis and technical primer, language translation of analysis tools, and the Global Benchmarking Program.
• Format:
  PDF
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:bb82c3486df3a87464ec52494fe9f3cf4fe53a3e1d64b59a7e77ea37a370f1e4a8090d0fa3c2a5a8f9aa3b7495284cf2c6bd4bd1f8c81a7ac7840a479116e353
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87544/dot_87544_DS1.pdf
• File Type:
  [PDF - 2.15 MB ]