Strategies for Improving Traffic Operations at Oversaturated Diamond Interchanges

Details

• Creators:
  Herrick, G Curtis ; Messer, Carroll J.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Diamond interchanges
  • Geometric design
  • Highway capacity
  • Peak hour traffic
  • Signalized intersections
  • Traffic flow
  • Traffic queuing
  • Traffic signal timing
• Publication/ Report Number:
  FHWA/TX-92/1148-4F
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Texas
• Edition:
  Final-September 1987 March 1992
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  This is the fourth and final report conducted within research project 1148 entitled "Guidelines for Operational Control of Diamond Interchanges" conducted by Texas Transportation Institute for Texas Department of Transportation within its HR&P research program. This final report (1148-4F) contains recommended strategies for improving traffic operations at signalized diamond interchanges that are becoming oversaturated (i.e., have demand volumes exceeding phase capacity) for periods of time during the peak rush hours of the day. This problem is expected to grow worse with time as traffic was found to increase at about 3.2% per year in the six largest Texas cities. Enhanced features for third-generation traffic control are also commended for consideration in future specification updates of diamond controllers. Traffic signal manufacturers may also wish to examine these new features as the operational need for them rises. In addition, enhanced traffic detector strategies are also provided to identify the presence of queue backups onto the freeway drive oversaturated conditions.
• Format:
  PDF
• Funding:
  Study No. 2-18-88-1148
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/84787/dot_84787_DS1.pdf
• File Type:
  [PDF - 3.53 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:64672b3ac6f150c77df61415ccf61a582c454f5db7bbd268a66e94ce382cac91f5c4336e543c984ad979b52e85b9d1babbbb140c38dd85e9aa8f0cdbc00d287c