HPT

11.1Redundant Systems:

In the same manner that an airliner must be capable of continuing flight in the event of a malfunction, in order to avoid blocking the Grid a Hybrid PT compliant vehicle will incorporate several redundant methods of continuing transit along the Grid until reaching the next exit. During Phase I and II, while using the Hybrid PT System, Grid vehicles will run solely on electrical power using each of 4 individual electric motors at all times. Each motor will be individually connected to one, of two, electrical busses through typical fused circuitry. In the event of the failure of one, two, or three electric motors, a Grid vehicle will be capable of continuing under its own power to an exit on any one of the electric motors although speeds may be greatly reduced. If however, a Grid vehicle has connected with a train of vehicles, and is not the last vehicle, it may be pushed by the vehicles behind it to a safe exit position.