01697629

Component

This study evaluated the factors impacting transit bus travel time through statistical modeling and sensitivity analysis. With increasing transportation costs and congestions, travelers are leaning much towards bus transit transportation as an alternative; hence knowledge of the impact of some factors influencing travel time is essential for planning, scheduling and operational purposes. A full bus survey on bus service in Nashville Tennessee was conducted to facilitate this study. Four travel time components extracted from the survey data including time spent at link segments, delay at signalized intersections, dwelling time and delay due to route specifics were evaluated. The results showed that bus dwelling time has the strongest impact to bus travel time while intersection delays have the lowest significant impact. The type of land use along the bus route was found to influence travel time but with insignificant effect. Sensitivity analysis of the impact of individual variables such as posted speed limit, signalized intersections density, bus stops density, and dwell time, cycle length at intersections, green time, service rate and demand were also performed. Change in bus stop density was found to be the most sensitive variable to bus travel time as it controls dwelling time which was also found to be a major determinant of total bus travel time.

This paper was sponsored by TRB committee AP050 Standing Committee on Bus Transit Systems.

19-00065

English

17p

2019

Transportation Research Board 98th Annual Meeting

Digital/other

Figures; Maps; References; Tables

Bus stops; Bus transit; Bus transit operations; Delays; Dwell time; Sensitivity analysis; Travel time

Nashville (Tennessee)

Highways; Operations and Traffic Management; Planning and Forecasting; Public Transportation

Transportation Research Board Annual Meeting 2019 Paper #19-00065

TRIS, TRB, ATRI

Dec 7 2018 9:33AM