UPDATED SHORT-TERM FREEWAY WORK ZONE LANE CLOSURE CAPACITY VALUES. INTERIM REPORT

Recommendations on estimating the capacity of short-term freeway work zone lane closures are presented. The recommendations are based upon 45 hours of capacity counts at 33 different work zones between 1987 and 1991. These new data indicate average capacities for short-term freeway work zone lane closures from 3 to 1 lanes and from 2 to 1 lanes that are significantly higher than older values reported in the 1985 Highway Capacity Manual. A base capacity value of 1,600 pcphpl is recommended for all short-term freeway work zone lane closure configurations. Adjustments are recommended for the effects of the intensity of work activity, percentage of heavy vehicles in the traffic stream, and presence of entrance ramps near the beginning of the lane closure. It is recommended that the new base capacity value and adjustments be used in lieu of the current procedures in the 1985 Highway Capacity Manual.

• Supplemental Notes:
  • Research study title: Traffic Pattern Assessment and Road User Delay Costs Resulting from Roadway Construction Options.
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011

  Texas Department of Transportation

  Transportation Planning Division, P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Krammes, R A
  • Lopez, G O
• Publication Date: 1992-9

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 33 p.

Subject/Index Terms

• TRT Terms: Estimating; Freeways; Highway capacity; Lane closure; Recommendations; Time duration; Work zone traffic control
• Uncontrolled Terms: Short term
• Old TRIS Terms: Lane closing
• Subject Areas: Highways; Operations and Traffic Management; Research; I71: Traffic Theory;

Filing Info

• Accession Number: 00629073
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-92/1108-5, Res Rept 1108-5, TTI: 2-8-87/1-1108
• Contract Numbers: Study 2-8-87/1-1108
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 14 1996 12:00AM