Trial of Laser-Based Compliance for Asphalt Surfaces

This report is a published project report detailing a trial conducted by TRL Limited for National Highways, focusing on laser-based compliance requirements for ride quality and texture depth of newly laid asphalt surfaces. The project aims to enhance pavement smoothness on the Strategic Road Network (SRN) through improved standards, ultimately leading to cost-effective changes in construction and maintenance practices. The report outlines the development of a Quality Assurance/Quality Control (QA/QC) approach utilizing non-contact measurement methods to achieve durable and comfortable road surfaces. It presents the trial's details, including assessment criteria, summary results, observations from data analysis, and feedback from asphalt installers. The findings indicate high compliance levels for texture depth, while ride quality results were more variable. The report concludes with recommendations for implementing the new compliance requirements, emphasizing staged implementation, stakeholder engagement, and the development of automated data analysis tools to support the compliance process.