What powers do they have concerning vehicles?
The powers concerning vehicles, according to the provided context, are as follows: "communications, that is to say, roads, bridges, ferries and other means of communication not specified in List I of the Seventh Schedule; municipal tramways, ropeways, inland waterways and traffic thereon subject to the provisions of List I and List III of the Seventh Schedule with regard to such waterways; vehicles other than mechanically propelled vehicles."