01663002

Component

https://doi.org/10.1177/0361198118787090

The paper presents a practical method for incorporation of travel time reliability in a regional travel model. The discussion includes five consecutive steps. First it describes how the vehicle speed dataset for the metropolitan area of Phoenix, AZ, termed HERE, was processed and link-level volume–delay–reliability functions were estimated, and then how link-level reliability measures can be applied for network path building. The third step describes how trip origin–destination (OD) reliability measures can be constructed out of the link-level reliability measures. The fourth step involves implementation of the link-level and OD-level reliability measures in highway assignment, mode choice, and other travel models. The fifth step includes model validation and sensitivity tests. The paper addresses several long-standing issues associated with incorporation of travel time reliability in operational travel models in practice. These issues include construction of OD reliability measures with the recognition that the core link-level reliability measures such as standard deviation or variance are not additive in a general case, accounting for a partial correlation between travel time distributions for different links, and incorporation of travel time reliability in a standard static assignment.

18-03028

English

pp 46-57

2018-12

Transportation Research Record: Journal of the Transportation Research Board

Print

Figures (2) ; References (15) ; Tables (3)

Data analysis; Regional transportation; Statistical analysis; Traffic congestion; Traffic volume; Travel demand; Travel time

Maricopa Association of Governments; Volume-Delay-Reliability Function

Phoenix (Arizona)

Data and Information Technology; Highways; Planning and Forecasting

TRIS, TRB, ATRI

Jan 8 2018 10:43AM

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