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Title:

Evaluation of Expected Traffic Sign Life in South Carolina

Accession Number:

01660967

Record Type:

Component

Abstract:

The degradation of traffic signs in South Carolina is investigated. Data from 1,599 SCDOT-maintained signs over a nine-month period are presented. The signs are selected to provide a representative sample in terms of geographic location and age. In addition to measuring the retroreflectivity of each sign, other sign data collected include the sign number, assembly number, height, offset, color, sheeting type, sheeting manufacturer, degree of shade, GPS coordinates, and sign facing direction. Exponential and polynomial regression models predicting the retroreflectivity are developed to determine a sign’s expected life (i.e., before its retroreflectivity falls below the required minimum standard). Age and degree of shade were found to be statistically significant dependent variables along with northwest facing direction for red stop signs. Based on the results of the developed regression models and failure rate function, it is recommended that signs be replaced after 10 years in service.

Supplemental Notes:

This paper was sponsored by TRB committee AHB50 Standing Committee on Traffic Control Devices.

Report/Paper Numbers:

18-06183

Language:

English

Authors:

Pulver, Zane
Huynh, Nathan
Mullen, Robert L

Pagination:

17p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Geographic Terms:

South Carolina

Subject Areas:

Highways; Operations and Traffic Management; Vehicles and Equipment

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-06183

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 11:36AM