Retroreflective Raised Pavement Marker Field Testing: Results of the First Year Evaluation

Ullman, Gerald L.

i

Retroreflective Raised Pavement Marker Field Testing: Results of the First Year Evaluation

1994-01-01
By Ullman, Gerald L.

File Language:

English

Details

Creators:

Ullman, Gerald L.
Corporate Creators:

Texas Transportation Institute. Texas A&M University
Contributors:

Rhodes, Lewis
Corporate Contributors:

Texas. Dept. of Transportation. Office of Research and Technology Transfer
Subject/TRT Terms:
Publication/ Report Number:

TX-93/1946-2
Resource Type:

Tech Report
Geographical Coverage:

United States ; San Antonio (Texas)
Edition:

Interim: August 1992 - December 1993
Corporate Publisher:

Texas Transportation Institute. Texas A&M University
Abstract:

This report documents the results of field testing of seventeen types of retroreflective raised pavement markers (RRPMs) installed in August 1992 at four interstate locations around San Antonio, Texas. Reflectivity measurements were taken periodically at each site using a portable reflectometer. These data were supplemented with laboratory reflectivity measurements from RRPMs taken from each site and sent to the TxDOT testing laboratory in Austin, Texas. Study results indicate that most of the RRPMs experienced significant losses in reflectivity over very short periods of time. Under the range of traffic conditions examined, many RRPMs dropped below approximate minimum reflectivity thresholds after six months in the field. Initial losses in reflectivity were due primarily to dirt accumulation on the reflective lenses. Over time, abrasions and weathering caused reflectivity losses to become permanent.
Format:

PDF
Funding:

7-1946
Download URL:

https://rosap.ntl.bts.gov/view/dot/83152/dot_83152_DS1.pdf
File Type:

[PDF - 2.26 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:851ff828a96d811aac52c13e8c7d1d494f77fabfc0274875d76b64d562573f074d094ce8613c6272603d1912658842a10b74edd8539d6ab60b05c9d844693c4f

File Language:

English

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