Guidelines for signal operations at intersections with wide medians.

Details

• Creators:
  Sunkari, Srinivasa R. ; Songchitruksa, Praprut ; Zeng, Xiaosi ; Balke, Kevin ; Obeng-Boampong, Kwaku
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office
• Subject/TRT Terms:
  • Signalized intersections
  • Traffic signs
  • Traffic signals
  • Signalized intersections--Texas--Management
  • Traffic signs and signals--Texas
• Publication/ Report Number:
  FHWA/TX-10/0-6176-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical Report; Sept. 2008-Aug. 2009.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  The objective of this project is to evaluate the operations at signalized intersections with wide medians in ; order to improve safety and efficiency. Intersections with wide medians are characterized by two ; intersections and operate differently compared to a typical intersection. Space in the wide median between ; the two intersections can be used to store vehicles. However management of the storage space is critical to ; avoid queue backing up into the upstream intersection. There are no guidelines specific to operate such ; intersections. This results in agencies using their discretion to develop strategies to operate such ; intersections, resulting in inconsistent operations. Texas Transportation Institute researchers used VISSIM ; simulation model to evaluate numerous strategies that were either in use by TxDOT districts or were ; developed by the research team. These strategies were evaluated for various widths of medians, the number ; of lanes for the minor street in the median, and the presence of left-turn bays on the major street. The ; strategies were also evaluated for low, medium, and high volumes on the major street and on the minor street ; as well as different percentages of turning traffic. The research project produced recommended strategies for ; various volume and geometric conditions.
  More +
• Format:
  PDF
• Funding:
  0-6176
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17756/dot_17756_DS1.pdf
• File Type:
  [PDF - 632.50 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:be9b65500902b5f3db8feeb1b58e6c2c946bc8fa06c9b7e11215df2c692bada1