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Title:

Assessment of Impacts of Increased Train Frequency and Predictive Transit Priority on a LRT Corridor in Salt Lake City

Accession Number:

01519239

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The goal of this paper is to evaluate combined effects of increased Light Rail Transit (LRT) vehicle frequencies and Predictive Priority Strategies (PPS) on traffic and transit operations along the 400 S corridor in Salt Lake City UT and at major intersections. An additional LRT line is planned to be introduced along this corridor in near future. This will increase the frequency of LRT trains, with possible impacts on traffic and transit operations. This paper estimates how these impacts change under different transit frequencies through VISSIM microsimulation. Potential enhancements in traffic signal control at critical intersections, consisting of modifications in signal phasing sequence and optimization of signal timing parameters, are also presented and evaluated. Two models are tested under five operational scenarios: Base and Enhanced model, for transit frequencies of four, eight, twelve, sixteen and twenty LRT vehicles per hour along the 400 S corridor. The study is using Siemens NextPhase Software-in-the-Loop (SIL) signal controllers to accurately represent LRT PPS logic. The analysis was performed on corridor, intersection, and network-wide levels. The results showed that the increased LRT frequencies had certain impacts on traffic and transit operations, mostly at critical intersections and at the network-wide level. The recommended enhancements in signal control parameters proved to be beneficial in lessening the negative impacts of increased LRT frequencies, especially for the highest tested frequencies.

Supplemental Notes:

This paper was sponsored by TRB committee AP075 Light Rail Transit.

Monograph Accession #:

01503729

Report/Paper Numbers:

14-4042

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Zlatkovic, Milan
Stevanovic, Aleksandar

Pagination:

19p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Identifier Terms:

VISSIM (Computer model)

Uncontrolled Terms:

Transit priority

Geographic Terms:

Salt Lake City (Utah)

Subject Areas:

Highways; Operations and Traffic Management; Public Transportation; Railroads; I73: Traffic Control

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-4042

Files:

TRIS, TRB, ATRI

Created Date:

Jan 27 2014 3:24PM