Details:

Creators:
Koziol, J. S.
Corporate Creators:
John A. Volpe National Transportation Systems Center (U.S.) ; United States. Federal Highway Administration
John A. Volpe National Transportation Systems Center (U.S.) ; United States. Federal Highway Administration Less -
Subject/TRT Terms:
[+]
Analysis
Benefits
Bus Priority
Headways Control
Local Service Buses
Traffic Signal Preemption
Urban Traffic
Bus Traffic
Headways

Publication/ Report Number:
DOT-TSC-HW911-PM-79-10
Resource Type:
Tech Report
Edition:
Project memorandum
Corporate Publisher:
John A. Volpe National Transportation Systems Center (U.S.)
NTL Classification:
NTL-SAFETY AND SECURITY-SAFETY AND SECURITY ; NTL-SAFETY AND SECURITY-Human Factors ;
Abstract:
This report investigates the application of selective traffic signal preemption

for controlling the headways of local service buses (buses with average time

headways of less than 10 minutes), The preemption is selective in that it is granted

to only "late" buses along a route, leading to a reduction in headway variance. The potential benefits of more evenly spaced bus headways include reduced passenger

waiting times, reduced incidence of bus over loadings and more efficient fleet operation. Past application of traffic signal preemption systems have concentrated on

reducing travel times for buses in Central Business District (CBD) grids and arterials.

However, these systems have not been widely accepted and implemented,

indicating that the amount of reduction in travel time has not resulted in a sufficient

increase in ridership to offset the system costs and impacts on other traffic.

The analysis and simulation results in this report indicated that selective

traffic s1gual preemption is a feasible method for controlling the headways of buses

on short headway routes. Furthermore, selective preemp-ifon yielded equal or better

transit system performance compared to unconditional preemption with less than half

as many preemptions and preempted cycle time. Future plans are discussed for expandinr,

the simulation model developed in this report and continuing the analysis.

The output of this work is expected to be a quantification of benefits as a function

of bus priority variables, traffic variables and route characteristics.


Format:
PDF
Collection(s):
Volpe
Main Document Checksum:
[+]
urn:sha256:e65539884d23222285fc3ca6c06ef1c7025840f5262104b8124425344ee0c7b6
File Type:

Supporting Files

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