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Title:

Improving Survey Methods Using a New Objective Metric for Measuring Driving Time Variability in Survey and GPS Data

Accession Number:

01370341

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 USA
Order URL: http://amonline.trb.org/

Abstract:

Accurate estimates of day-to-day variability in driving times are of critical importance for many travel-related issues: predicting traffic congestion from past traffic patterns, estimating emissions, and estimating relative crash risk compared to baseline driving exposure. Driving times based on survey data necessarily rely upon subjective recall as obtained in daily diaries, interviews or phone surveys. Within the last few decades, objective GPS data have become available in travel studies carried out in many major cities in the U.S. and other countries. Few studies to date have compared GPS and survey data for the same subjects on the same day of travel, and even fewer studies have collected both GPS and survey data for more than one day of travel. This paper proposes a new objective metric for comparing GPS and diary data either on the same day or across multiple days that does not require trip matching, thereby improving accuracy of both GPS and survey methods for estimating day-to-day variability. The proposed metric allows an objective measure for within- and between-day comparisons between survey and GPS methods, as well as estimating day-to-day variability in driving times within survey and GPS methods. This new metric may improve reliability and accuracy of both survey and GPS estimates of day-to-day driving consistency.

Supplemental Notes:

This paper was sponsored by TRB committee ABJ40 Travel Survey Methods

Monograph Accession #:

01362476

Report Numbers:

12-4086

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 USA

Authors:

Seaman, Sean
Young, Richard A

Pagination:

16p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References

Subject Areas:

Data and Information Technology; Highways; I71: Traffic Theory

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-4086

Files:

TRIS, TRB

Created Date:

Feb 8 2012 5:21PM