TransportationElectronic Toll Collection ETC offers the opportunity for toll facility operators to supply a substantially greater amount of traffic capacity than any other currently available form of toll collection. It saves time, fuel and improves the efficiency.More cars ,more traffic jams. The German no speed limit highway The traffic accident is almost inevitableWith the help of the modern transportations ,we have many choices when we go outside.But it also brings many problems, such as air pollutions ,noises and ecological destructions.