Exploring corridor operations in the vicinity of a diverging diamond interchange (DDI) : final report.

Details

• Creators:
  Cunningham, Christopher M. ; Warchol, Shannon ; Schroeder, Bastian J.
• Corporate Creators:
  North Carolina State University. Institute for Transportation Research & Education
• Corporate Contributors:
  North Carolina. Dept. of Transportation. Research and Analysis Group ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Costs
  • Diamond interchanges
  • Field studies
  • Geometric design
  • Highway corridors
  • Microsimulation
  • Traffic delays
  • Traffic signal phases
  • Traffic signal timing
  • Traffic simulation
  More +
• Publication/ Report Number:
  FHWA/NC/2014-13
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;North Carolina
• Edition:
  Final report, August 2013 to May 2016
• Corporate Publisher:
  North Carolina. Department of Transportation
• Abstract:
  This research effort examined the corridor impacts of various signal timing and geometric strategies to improve the ; operational challenges observed at DDIs. A microsimulation analysis was conducted using a calibrated and validated DDI ; modeled after the National Avenue and US-60 interchange in Springfield, Missouri. Four heavy volume scenarios were ; tested in combination with seven categories of strategies. These strategies were selected from a larger pool of strategies ; under the guidance of the NCDOT research panel and national expert recommendations. In addition to the microsimulation ; effort, a cost analysis was conducted for the same strategies. Considerations were made for implementation cost, disruption ; to user during implementation, and crash modification impacts. Finally, three sites in North Carolina were selected for field ; study. In the microsimulation analysis, those strategies which reduced the number of phases at the downstream adjacent ; intersection had the greatest benefit on the corridor routes for all four heavy volume scenarios. The reduction in phases ; reduced loss time and increased capacity for the intersection. Unfortunately, these strategies were also the most expensive ; alternatives studied, were likely to be the most disruptive to users during implementation.
  More +
• Format:
  PDF
• Funding:
  2014-13
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31057/dot_31057_DS1.pdf
• File Type:
  [PDF - 14.87 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a0d806f2843996aa0ae0205b230caa3bbba490c05d79082ac498f1fed19343fb045519752f8b287d003112dc8cee9207a7cc6870dc1e54ffc9c3eac3be4e7fd4