2/20/2023 0 Comments Qcs 2.38![]() Piecewise multiple linear models are proposed to explicitly account for the effect of winter weather events in this study. This study develops degradation models that can predict retroreflectivity of durable pavement marking materials under various winter weather conditions. Most existing models for prediction of pavement marking retroreflectivity have been developed from data collected in locations with similar weather conditions therefore, the effect of different weather conditions, such as winter weather events, has not been extensively studied. Additionally, data suggests there is an initial appreciation in retro-reflectivity within the first few months of marking installation before the onset of decay. The rate of retro-reflectivity loss was the same for the Coastal Savanna and Forest zones (0.15mcd/m²/lux/day) but significantly different from that for the Northern Savanna zone (0.267mcd/m²/lux/day) at 5% significance level (p<0.05). Retro-reflectivity at any time since marking installation was characterized by a multiple linear function involving initial retro-reflectivity and time. Thus, thermoplastic pavement markings were installed on trunk roads in 3 eco-climatic zones and their retro-reflectivity monitored over time to establish rate of degradation. However, road agencies lack data and information on how the material degrades to permit effective management of re-marking interventions. Markings decay in retro-reflectivity, due to material degradation over time and must be remarked to restore marking visibility. ![]() Retro-reflective thermoplastic pavement markings enhance roadway visibility at night and help avoid lane-departure crashes.
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