Highly retroreflective horizontal road markings: drivers' preception
Horizontal road markings are common safety features that can be found on all roads. Scientific analyses demonstrated that road safety was improved on roads where the markings had higher retroreflectivity. The standard retroreflectivity reaches only about 350 mcd/m²/lx initially and is permitted to drop to 100 mcd/m²/lx. On a 2 km stretch of a curved rural road, we have applied markings with improved retroreflectivity, approaching 700 mcd/m²/lx initially. Whereas durability of the system is still under evaluation, opinion of drivers about the increased retroreflectivity was assessed using a questionnaire. Amongst 156 valid filled questionnaires, 58-75% of respondents reported noticing markings with retroreflectivity higher than the standard with those who use the road every day most likely to observe this added safety feature. Over 80% of respondents felt that road safety during nighttime driving would increase if horizontal markings had higher retroreflectivity. Amongst the responders, there was an overrepresentation of young drivers and underrepresentation of older ones, which might have skewed the results.