Alternative Intersections/Interchanges: Informational Report (AIIR)

Today’s transportation professionals are challenged to meet the mobility needs of an increasing population with limited resources. At many highway junctions, congestion continues to worsen. Drivers, pedestrians, and bicyclists experience longer delays and greater exposure to risk. Today’s traffic and safety problems are more complex and complicated. Conventional intersection/interchange designs are sometimes found to be insufficient to mitigate transportation problems. Consequently, many engineers are investigating and implementing innovative treatments in an attempt to think outside the box. This report covers four intersection designs and two interchange designs that may offer additional benefits compared to conventional at-grade intersections and grade-separated diamond interchanges. The six alternative treatments covered in this report are displaced left-turn (DLT) intersections, restricted crossing U-turn (RCUT) intersections, median U-turn (MUT) intersections, quadrant roadway (QR) intersections, double crossover diamond (DCD) interchanges, and DLT interchanges. The information presented in this report provides knowledge of each of the six alternative treatments including salient geometric design features, operational and safety issues, access management issues, costs, and construction sequencing and applicability.

• Record URL:
  http://www.fhwa.dot.gov/publications/research/safety/09060/09060.pdf
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/37466
• Corporate Authors:

  Vanasse Hangen Brustlin, Incorporated

  8300 Boone Boulevard, Suite 700
  Vienna, VA  United States  22182-2626

  Federal Highway Administration

  Office of Safety Research and Development
  6300 Georgetown Pike
  McLean, VA  United States  22101-2296
• Authors:
  • Hughes, Warren
  • Jagannathan, Ramanujan
  • Sengupta, Dibyendu
  • Hummer, Joseph E
• Publication Date: 2010-4

Language

• English

Media Info

• Media Type: Web
• Edition: Technical Report
• Features: Figures; Photos; References; Tables;
• Pagination: 344p

Subject/Index Terms

• TRT Terms: Access control (Transportation); Construction; Costs; Geometric design; Highway safety; Interchanges and intersections; Restricted crossing U turn intersections
• Uncontrolled Terms: Displaced left turn interchanges; Displaced left turn intersections; Double crossover diamond interchanges; Median U-turn intersections; Quadrant roadway intersections
• Subject Areas: Design; Highways; Operations and Traffic Management; I20: Design and Planning of Transport Infrastructure; I73: Traffic Control;

Filing Info

• Accession Number: 01159405
• Record Type: Publication
• Report/Paper Numbers: FHWA-HRT-09-060, Project 37769.19
• Contract Numbers: DTFH61-05-D-00024 (VHB) Task T-06-016
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Jun 18 2010 4:18PM