Development of Arrival Time Based Uniform Delay Models for Oversaturated Signalized Intersections

Comparisons of control delays show that HCM estimates were not significantly different from the simulated filed data generated by CORSIM for 12 scenarios out of 28 for zero initial queue conditions, and 14 scenarios out of 28 for nonzero initial queue conditions, however for the remaining scenarios they were significantly different. On the contrary, the control delays from the proposed delay models were not significantly different from simulated field data generated by CORSIM for 28 scenarios out of 28 for zero initial queue conditions, and 28 scenarios out of 28 for nonzero initial queue conditions. Statistical comparisons for Arrival Type 6 were not conducted since there might not be practical meaning for Arrival Type 6 in oversaturated traffic conditions. The results of sensitivity analysis for the proposed model to various green to cycle ratios showed that delay decreased as g/C ratio increased, as expected. Furthermore, the simulated data and the proposed models support that there are platoon impacts on delay in oversaturated conditions. The proposed models were used to develop a set of new progression adjustment factors (PF) for oversaturated conditions that can be used with the HCM delay model.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil and Environmental Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Kim, Sang-Ock

Contributors dc:contributor

• Benekohal, Rahim F.

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI3202113

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83284