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Title:

Delay Correction Model for Estimating Bus Emissions at Intersections Based on VSP Distributions

Accession Number:

01515251

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The intersection is one of the biggest emission points for buses. Although numerous performance indexes have been developed for evaluating the level of service at intersections, few studies have focused on the relationship between commonly used performance indexes and emissions at intersections. This paper intends to propose a model that relates emissions to commonly used performance indexes (i.e. delay, stops) by using bus activity data and emissions data at intersections. First, with a large number of real-world instantaneous emission data and corresponding activity data collected by the Portable Emission Measurement System (PEMS), emission rates are derived for different Vehicle Specific Power (VSP) bins. Then, 2,002 sets of trajectory data, an equivalent of about 140,000 sets of activity data, are obtained from Global Position Systems (GPS)-equipped diesel buses in Beijing. The delay and the emission factor of each trajectory data are estimated. Then, by using baseline emission factors for two types of intersections, e.g. the Arterial @ Arterial Intersection and the Arterial @ Collector, delay correction factors are calculated for the two types of intersections in different delays. Finally, delay correction models are established for each type of intersections and different numbers of stops. A comparative analysis between estimated and actual emissions factors demonstrate that the delay correction model is reliable.

Supplemental Notes:

This paper was sponsored by TRB committee ADC20 Transportation and Air Quality. Alternate title: Delay Correction Model for Estimating Bus Emissions at Intersections Based on Vehicle-Specific Power Distributions

Monograph Accession #:

01503729

Report/Paper Numbers:

14-1956

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Zhou, Xixi
Song, Guohua
Yu, Lei

Pagination:

20p

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

Uncontrolled Terms:

Vehicle specific power

Geographic Terms:

Beijing (China)

Subject Areas:

Environment; Highways; Planning and Forecasting; Vehicles and Equipment; I15: Environment; I72: Traffic and Transport Planning; I90: Vehicles

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-1956

Files:

TRIS, TRB, ATRI

Created Date:

Jan 27 2014 2:41PM