This synthesis examines the history and evolution of Highway Cost Allocation Study (HCAS) practice, and reports on the current state of the practice. This report is designed to aid states by laying the foundation required to build on current thought and improve current HCAS methods. This report addresses numerous issues, including what states have completed cost allocation studies, the conceptual basis of HCAS methods, methods used to allocate the costs associated with many highway program elements, methods for revenue attribution, and emerging HCAS issues. Information for the study was obtained through review of literature and a survey of state transportation agencies that have performed HCASs. Eleven key states are highlighted: Arizona, California, Idaho, Indiana, Kentucky, Maine, Minnesota, Nevada, Oregon, Texas, and Vermont. The study also reports on survey responses on procedures for completing both traditional HCASs and for conducting HCAS analysis in new and emerging areas. This synthesis is an immediately useful document that records the practices that were acceptable within the limitations of the knowledge available at the time of its preparation. As progress in research and practice continues, new knowledge will be added to that now at hand. (Author/publisher) This report may be accessed by Internet users at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_378.pdf
Samenvatting