California Transportation: Inventory and Prospects
概述了加州交通系统的现状，指出高速公路老化、拥堵严重，需要大规模翻新，对交通规划者和政策制定者有参考价值。
California has a superb transportation system. The 171,000 miles of public access highways provide both feeder and arterial systems throughout the state and allow rail, air, and port facilities to operate more efficiently. Approximately 97 percent of the passenger miles and more than 80 percent of the ton-miles of freight are transported by autos, trucks, and buses using this highway system. But the system is aging. Many of the most heavily traveled routes have exceeded their 25 year “design life.” Surfaces are cracking and buckling, on ramps are too short for the larger trucks and buses, and use of off ramps is so far in excess of designed capacity that congestion backs up onto freewavs and arterial streets. Major renovations are required which will be costly and require the closing of facilities.