so many times we have watched hapless drivers take their trucks or busses under a low bridge,
and taken the top off of them, but although the idea has been around for some time, this could help stop that happening, as the vehicle triggers a sensor that means that the vehicle is too tall, a water curtain is released at the tunnel or bridge entrance,
a sign is then projected on to the water surface warning the driver to stop, not only useful for tall vehicles, the sign can also be used in emergencies warning other drivers not to enter the tunnel, what a great idea the Softstop tunnel warning system is.
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