Guidelines for the Implementation of Flipped Left Diamond Interchange (FLDI) Design

Details

• Creators:
  Qi, Yi
• Corporate Creators:
  New York University. Tandon School of Engineering ; Connected Communities for Smart Mobility Toward Accessible and Resilient Transportation for Equitably Reducing Congestion (C2SMARTER) Tier-1 University Transportation Center (UTC) ; Texas Southern University
• Corporate Contributors:
  United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Diamond interchanges
  • Geometric design
  • Highway design
  • Traffic signal timing
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Connected Communities for Smart Mobility Toward Accessible and Resilient Transportation for Equitably Reducing Congestion (C2SMARTER) Tier-1 University Transportation Center (UTC)
• Abstract:
  The Flipped Left Diamond Interchange (FLDI) with frontage roads offers several operational benefits. It eliminates conflict points between opposing left-turn movements by flipping the left-turn lanes in opposing directions, allowing simultaneous left-turn movements and improving traffic signal efficiency. FLDI with frontage roads maintains connectivity between frontage roads, which enhances through movements and access to corner properties. Additionally, it significantly reduces vehicle delays, queue lengths, and the number of stops under heavy traffic conditions. FLDI is cost-effective, as it can be implemented within the existing right of way without major construction, making it a practical solution for improving traffic operations at diamond interchanges. This paper develops guidelines for operationally effective FLDI based on research and existing roadway design guidelines. In developing these guidelines, both operational and safety performances were considered.
• Format:
  PDF
• Funding:
  69A3552348326
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86473/dot_86473_DS1.pdf
• File Type:
  [PDF - 1.27 MB]
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:c72a846c4b910a1447b3062b97e9fdbb81b75eaf6e1108006ca51df6b15820affcc40590df4a730c9202f9287e73463ae44e2895f520726617d657107e42a486