Study Details

Study Title: Nighttime Safety and Pavement Marking Retroreflectivity on Two-Lane Highways: Revisited with North Carolina Data

Authors: Carlson et al.

Publication Date: JAN, 2015

Abstract: The relationship between pavement marking retroreflectivity and nighttime safety has been a topic of research for past decade or more but consistent findings have been elusive despite the intuitive nature of having bright markings. This paper builds from previous work that used Michigan retroreflectivity and crash data to demonstrate that pavement marking retroreflectivity relates to the nighttime safety on rural two-lane highways in a meaningful way. In this paper, new data from North Carolina were obtained and used. The North Carolina data were used to test the robustness of the statistical models derived from the Michigan data. Additional analyses were also explored and described in this paper. Using results from this paper, previous research, and state of the practice, recommendations and their implications are presented for safety-derived minimum retroreflectivity levels for pavement markings.

Study Citation: Carlson, P., R. Avelar, E. Park, D, Kang. "Nighttime Safety and Pavement Marking Retroreflectivity on Two-Lane Highways: Revisited with North Carolina Data". Presented at the 94th Annual Meeting of the Transportation Research Board, Paper No. 15-5753, Washington, D.C., (2015).


CMFs Associated With This Study

Category: Delineation

Countermeasure: Increase pavement marking retroreflectivity

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.852 14.8 2 Stars Nighttime All Not specified Rural
0.717 28.3 2 Stars Nighttime All Not specified Rural