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Title:

Quantification of Possible Impacts of Capacity Expansion Projects on Transportation Costs via Trip-Based Full Marginal Cost Estimation Methodology

Accession Number:

01088443

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

This paper evaluates the impacts of proposed capacity expansions on the full trip-costs on large transportation networks such as Northern New Jersey. Unlike most previous studies, considering link-based measures only, this study focuses on individual trips to estimate the short-term changes in full marginal costs (FMC). Trips between each origin-destination (O-D) pair are represented as paths determined via a novel constrained kth shortest-path algorithm developed as part of the proposed methodology. Road sections are selected as candidates for capacity expansion based on the FMCs obtained for the whole network, i.e., road sections with highest FMC values are selected. Proposed approach for the before-and-after analysis is illustrated using four road sections (State-Highway (SR) 18, SR-17, SR-3, and Garden State Parkway (GSP)). Transportation costs calculated for before-and-after the capacity expansion and their fitted distributions show that trip-cost between a given O-D pair is not constant; rather it follows a probability distribution whose shape is affected by the road characteristics such as road and area types and number of lanes among other factors. Calculated costs at different probability levels show that highest reductions in the FMC are observed along SR-3 and GSP. Cumulative change in the FMCs of these segments is less than 20% with a probability of 0.95 and less than 15% with a probability of 0.5. This type of analysis gives a different and unique insight to policy planners regarding quantification of transportation costs in worst and best cases, and identification of projects that are most likely to generate highest benefits.

Monograph Accession #:

01084478

Report/Paper Numbers:

08-2094

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Yanmaz-Tuzel, Ozlem
Ozbay, Kaan
Mudigonda, Sandeep
Bartin, Bekir

Pagination:

21p

Publication Date:

2008

Conference:

Transportation Research Board 87th Annual Meeting

Location: Washington DC, United States
Date: 2008-1-13 to 2008-1-17
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures; Maps; References (32) ; Tables (5)

Identifier Terms:

Garden State Parkway

Uncontrolled Terms:

Expansion projects

Subject Areas:

Highways; Planning and Forecasting; Policy; Public Transportation; I72: Traffic and Transport Planning

Source Data:

Transportation Research Board Annual Meeting 2008 Paper #08-2094

Files:

TRIS, TRB

Created Date:

Jan 29 2008 4:26PM