Research

This paper is a review of the Ministry of Transportation of British Columbia’s successful experience with HIR and describes the evolution of the program over a 25-year history. The paper documents the evolution of the program that has led to an increased service life of HIR at a cost of approximately 50% less than conventional mill and fill with an estimated 30 to 40 percent reduction in greenhouses gasses. The paper describes changes to project selection criteria, preconstruction sampling and testing requirements and construction specifications that are responsible for the successful HIR program in British Columbia.

British Columbia Ministry of Transportation and Infrastructure.