TY - GEN
T1 - Traffic assignment by paired alternative segments
T2 - 17th International Conference of Hong Kong Society for Transportation Studies: Transportation and Logistics Management, HKSTS 2012
AU - Hu, Yucong
AU - Boyce, David
AU - Nie, Yu
AU - Bar-Gera, Hillel
PY - 2012
Y1 - 2012
N2 - This paper examines the performance of a new traffic assignment algorithm, TAPAS, in a case study drawn from transportation planning practice. By identifying and adjusting route and class link flows on pairs of alternative segments, TAPAS is able to converge quickly to the user equilibrium (UE) while finding unique UE route and class link flows, which satisfy a condition of proportionality. The results show that TAPAS achieves more precise solutions compared to a commercial traffic assignment tool based on Frank-Wolfe algorithm, and it generates them with much less computational effort. The case study reveals the project benefit estimated with the TAPAS solution is about 4% lower than that given by the commercial software, which may be large enough to influence decision making. This study provides initial evidence that higher levels of precision, and unique class link flows, may be necessary for certain analyses.
AB - This paper examines the performance of a new traffic assignment algorithm, TAPAS, in a case study drawn from transportation planning practice. By identifying and adjusting route and class link flows on pairs of alternative segments, TAPAS is able to converge quickly to the user equilibrium (UE) while finding unique UE route and class link flows, which satisfy a condition of proportionality. The results show that TAPAS achieves more precise solutions compared to a commercial traffic assignment tool based on Frank-Wolfe algorithm, and it generates them with much less computational effort. The case study reveals the project benefit estimated with the TAPAS solution is about 4% lower than that given by the commercial software, which may be large enough to influence decision making. This study provides initial evidence that higher levels of precision, and unique class link flows, may be necessary for certain analyses.
KW - Paired alternative segments
KW - Proportionality
KW - Traffic assignment
KW - User equilibrium
UR - http://www.scopus.com/inward/record.url?scp=84896873222&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84896873222&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84896873222
SN - 9789881581419
T3 - Proceedings of the 17th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2012: Transportation and Logistics Management
SP - 711
EP - 717
BT - Proceedings of the 17th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2012
Y2 - 15 December 2012 through 17 December 2012
ER -
