The Institute of Transportation Studies (ITS) is assisting the California Department of Transportation (CALTRANS) to establish and conduct a program of advanced highway technology R&D to obtain better productivity from the States’ most used highway segments. The Program on Advanced Technology for the High-way, PATH, centers on advanced technology opportunities that may contribute to the  relief of traffic congestion, with related problems of air pollution and parking; and on energy for transportation, in particular continued use of petroleum based fuels.