CAPACITY STUDY FOR PROTECTED-PERMITTED PHASING FROM SHARED LANES
Protected-permitted phasing from shared-use lanes (i.e., no left-turn bays) exists in certain situations where space and other constraints make this measure expedient in the face of growing traffic demand. An alternative method for handling this special case is proposed as an enhancement to the existing treatment in the 1997 update to the "Highway Capacity Manual". The method proposed is logical and consistent. The more practical issue of whether it is also more accurate is addressed in a series of simulation cases. Simulation was used to provide the reference conditions because of field costs, number of variables to be controlled, and the fact that a well-established model exists. The results show that the existing method systematically overestimates lane group capacity by 10 to 25% for this special case, whereas the proposed alternative estimates the lane group capacity by +/-10% or less.
- Record URL:
- Summary URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309071046
-
Supplemental Notes:
- This paper appears in Transportation Research Record No. 1678, Highway Capacity, Quality of Service, and Traffic Flow and Characteristics.
-
Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Prassas, E S
- Chang, J-I
- Publication Date: 1999
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 261-268
-
Serial:
- Transportation Research Record
- Issue Number: 1678
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Exclusive permissive phasing; Highway capacity; Traffic simulation
- Identifier Terms: Highway Capacity Manual
- Uncontrolled Terms: Shared-use lanes
- Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;
Filing Info
- Accession Number: 00778954
- Record Type: Publication
- ISBN: 0309071046
- Files: TRIS, TRB, ATRI
- Created Date: Nov 29 1999 12:00AM