The VTI National Transport Library Catalogue

Capacity study fpr protected-permitted phasing from shared lanes Prassas, Elena Shenk ; Chang, Jin-Il

By: Prassas, Elena ShenkContributor(s): Chang, Jin-IlPublication details: Transportation Research Record, 1999Description: nr 1678, s. 261-8Subject(s): USA | Traffic lane | Use | Simulation | | | Calculation | 25Bibl.nr: VTI P8167:1678Location: Abstract: 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.
Item type: Reports, conferences, monographs
Current library Call number Status Date due Barcode
Statens väg- och transportforskningsinstitut

VTI:s bibliotek i Linköping
bibliotek@vti.se

Available

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.

Powered by Koha