Title

Analysis of the Efficiency of Urban Commercial Vehicle Tours: Data Collection, Methodology, and Policy Implications

Published In

Transportation Research Part B: Methodological

Document Type

Article

Publication Date

11-2007

Subjects

Urban freight transportation, City logistics, Commercial vehicle tours, Truck trip distribution, Freight data collection, Empty trips, Trip length distribution

Abstract

The emphasis of this research is on the analysis of commercial vehicle tours. Tours are disaggregated by their routing constraints. The generation of vehicle kilometers traveled (VKT) by tour type is analytically modeled and analyzed. The relative influence of the number of stops per tour, tour duration, and time window constraints on VKT is discussed using an analytical framework. Multistop tours are shown to generate more VKT than direct deliveries even for equal payloads. Intuition about the impacts of network/logistics changes and policy implications on VKT is derived. Implications for the calibration of trip generation and distribution models are discussed. In the tour model, it is proven that the percentage of empty trips has no correlation with the efficiency of the tours regarding VKT generation. The shape of trip length distributions (TLD) is discussed. It is shown that the average trip length and the TLD shape are strongly dependent on the tour type, distance from the depot/distribution center to the service area, density of stops, and number of stops per tour. Implications for data collection needs are analyzed.

Description

Copyright 2013 Elsevier Ltd. All rights reserved.

DOI

10.1016/j.trb.2007.04.006

Persistent Identifier

http://archives.pdx.edu/ds/psu/20823