00932118

Component

https://doi.org/10.3141/1794-04

http://scholar.google.com...lock&publication_year=2002

Until recently, no federal guidance existed on the retroreflectivity of highway signs, and the replacement policy has been left to the discretion of local officials. The Federal Highway Administration (FHWA) has now published a proposed set of minimum retroreflectivity requirements for traffic signs. The proposed minimum retroreflectivity values published by FHWA were compared with retroreflectivity values observed from signs with ASTM Type III sheeting in the state of Indiana. Research found that approximately 4% of signs scheduled for removal in 2000 or 2001 were below the proposed FHWA minimums. Having different retroreflectivity minimums for different speeds and sign sizes unnecessarily complicates the proposed minimums. Using the single most conservative retroreflectivity value for each color would be sufficient.

This paper appears in Transportation Research Record No. 1794, Safety and Maintenance Services.

English

p. 29-37

2002

Transportation Research Record

0309077206

Figures (9) ; References (5) ; Tables (4)

Field studies; Proposals; Retroreflectivity; Sign sheeting; Standards; Traffic signs

U.S. Federal Highway Administration

Indiana

Geotechnology; Highways; Materials; Operations and Traffic Management; Research; I35: Miscellaneous Materials; I73: Traffic Control

TRIS, TRB, ATRI

Oct 25 2002 12:00AM

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