Anyone trying to evade the system is supposed to be detected by nearly 300 steel gantries which span the highway and are equipped with cameras ; there are also mobile toll police who perform spot checks .

任何试图逃避这个系统的人将被沿高速公路而建的300个钢架信号台以及安装的摄像机捕捉到；除此之外，还有流动收费警察执行定点检查。

And next year it plans to test a satellite-based system that does not require gantries and can charge according to how congested a road is at that particular time .

明年该局还计划测试一套以卫星定位为基础的收费系统，这样就不用建立公路收费站，只需根据特定时段这条公路的拥挤状况来进行收费。

Its stand is almost as large as those of the industry giants , the ravensburgers and mattels , but there are no 20ft signs , stages , or gantries .

那公司的台子几乎和行业巨头ravensburgers和mattels的一样大，不过没有20英尺高的标语，舞台或者起重架。