Demo Of Solution

Its hard sometimes to understand how something works from a description. So we have created a short demo sequence that shows the device in use. Due to filming constraints we couldn't film the device and the screen in a vehicle (its not possible to show both).

However you can clearly see how the warnings work, hear the spoken alerts and see the Low Bridges. Please turn up your sound to ensure that you hear all of the instructions. There is a cab height warning that appears telling the driver that he cannot fit under the bridge (this is ignored for the demo). Then as the driver continues a hard left turn suddenly reveals a bridge. In real life of course this would be hidden and so the emergency alert is useful in that it warns the driver to slow down just before.