摘要: |
The long-term performance, number, and variability of pavement marking materials and specifications depend on the ability to meet both day and night functionality on roadways, as well as on other characteristics such as surface topography, AADT, truck volume, regional weather conditions, and maintenance operations. To control the amount of pavement marking material applied on both liquid and thermoplastic marking applications has a direct bearing on the pavement marking’s longevity and life-cycle costs. This project shall synthesize best case examples of quality control of longitudinal, lane-line liquid and thermoplastic pavement marking applications. The research team will scan practices across the United States and other countries focusing on: 1) types of markings materials used and reasons for their use on different pavement types, including application thickness, quality control approaches and methods, including verifying selected thickness or quantity of markings; 2) types of specifications used, recommended language, and issues associated with each specification; 3) application rate verification in the field; i.e., thickness, volume, or rate; 4) equipment ability to measure quantity of marking applied and modifications to existing equipment; 5) how markings are paid for; i.e., subsidiary, by volume, or by length. |