Dualmode transportation is a term that describes a transportation system whose vehicles can be operated on both the conventional street system and on an exclusive, automated guideway under computer control. Clearly, such a system can provide door-to-door service which neither PRT nor GRT systems can do. Otherwise, the DM is similar to the other two concepts in most respects. But, far fewer miles of elevated guideway are needed for a dualmode system and a much smaller number of stations would be required as well. Travel on the automated part of the system would be hands-off, view-rich and probably somewhat faster that a comparable PRT or GRT system.
Lets be very clear about one point. None of these systems, if implemented, could be expected to replace the auto and leave the conventional roadway system empty and unused. But, depending on how intelligently they are implemented, they offer a significant potential for reducing auto dependence for travelers within our cities. Moreover, none would require the huge costs that have been experienced in tearing up and tunneling under our cities to build conventional rail and bus systems. In fact, dualmode systems offer the possibility of significantly lower costs as privately-owned dualmode autos would be common instead of all PRT and GRT vehicles having to be purchased and operated by some public or private agency.
【名家总结3月29日雅思A类阅读题】相关文章:
★ 雅思阅读分享
最新
2016-06-13
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29