Where snowfall is an issue, this system may not be practical: since the guide rail forms the return leg of the electrical circuit, accumulation of ice and snow on the rail could cause intermittent power interruptions to the vehicle. Also, as the vehicle does not place a significant portion of its weight on the guide wheel (most of it being supported by the rubber tyres), snow packed into the flangeways or atop the rail by road traffic could lift the guide wheel off the rail, leading the vehicle to go off course.
