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Title:

Measuring and Reporting Travel Time Reliability Statistics for the Most Congested Corridors in the United States: Methodology and Results

Accession Number:

01475371

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

For nearly 30 years, the Texas A&M Transportation Institute (TTI) has developed methodologies and appropriate performance measures for estimating congestion performance and communicating them to technical and non-technical audiences. TTI’s Urban Mobility Report (UMR) informs decision-making at the federal, state, and local levels. While very important for guiding policy discussion and assisting resource allocations to infrastructure, the congestion statistics in the UMR only tell part of the congestion story – the magnitude of the problem based on areawide average congestion levels. The reality is that congestion is not just an “average” problem. Reliability performance measures capture an important aspect of the travel experience, and they illustrate the variability in traffic congestion so that travelers can estimate the extra “buffer” time needed to ensure on-time arrival. The transportation profession is moving toward the use and application of travel reliability performance measures for project prioritization and decision-making. However, the practice of using reliability measures for decision-making is in its relative infancy. This paper describes the methodology and analytical procedures for computing and ranking corridors throughout the United States with reliability measures. The results are documented in TTI’s inaugural 2011 Congested Corridors Report (CCR). In this paper, researchers describe the methodology and reliability measures presented in the inaugural CCR. The results of the CCR identify the 328 most unreliable roadway corridors as ranked by the buffer index. The performance measures and detailed data like those used in the 2011 CCR can guide investments and improve decisions and communication about the congestion problem.

Supplemental Notes:

This paper was sponsored by TRB committee ABC30 Performance Measurement.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-1338

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Eisele, William L
Schrank, David L
Schuman, Rick
Lomax, Timothy J

Pagination:

24p

Publication Date:

2013

Conference:

Transportation Research Board 92nd Annual Meeting

Location: Washington DC, United States
Date: 2013-1-13 to 2013-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Geographic Terms:

United States

Subject Areas:

Data and Information Technology; Highways; Planning and Forecasting; I72: Traffic and Transport Planning

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-1338

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:21PM