diamond interchange signal timing.

Details

• Creators:
  Day, Christopher M. ; Stevens, Amanda ; Sturdevant, James R. ; Bullock, Darcy M.
• Corporate Creators:
  Purdue University. Joint Transportation Research Program
• Corporate Contributors:
  Indiana Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Diamond interchanges
  • Highway corridors
  • Optimization
  • Offsets (Traffic signal timing)
  • Field studies Signal timing
  • link pivot offset optimization
• Publication/ Report Number:
  FHWA/IN/JTRP-2015/27
• DOI:
  http://dx.doi.org/10.5703/1288284316012
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;Utah;Indiana
• Corporate Publisher:
  Purdue University. Joint Transportation Research Program
• Abstract:
  This report presents findings from field studies of operations at diverging diamond interchanges (DDIs) in Salt Lake City, Utah and Fort ; Wayne, Indiana. These discuss optimization of signal offsets both within the DDI, and with the DDI integrated as part of an arterial ; corridor. Optimization of Fort Wayne, Indiana corridor comprising the DDI and three neighboring intersections yielded an annualized ; user benefit of $564,000, when assessing origin‐destination paths both along the arterial and for movements to and from the freeway. ; This is the first field study of DDI offset optimization with neighboring intersections. Additionally, a pilot study was carried out in Salt ; Lake City on a new phasing scheme that incorporated a “holdback” phase into the signal sequence that delayed vehicles exiting the ; ramp in order to better coordinate their arrival at the downstream intersection, increasing the percent on green from 53% to 92%. The ; report concludes with a discussion of practical issues pertaining to DDI signal timing and provides a series of guidelines to assist in the ; design of new signal timing plans for future DDI deployments.
• Format:
  PDF
• Funding:
  SPR-3830
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30939/dot_30939_DS1.pdf
• File Type:
  [PDF - 4.66 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:700c5443132349bfa911fabb560f26b9232bdfa6aa63c8e356b13067e9de88ace1e5467b0bcc9b0b939077dc126849eee3fca68156483c7885d3187446d77b59