| http://www.w3.org/ns/prov#value | - There are three types of roadside beacons: Type 1 transmits location to the vehicle to zero???out cumulative navigation errors; Type 2 transmits, in addition to location, congestion and other traffic information; and Type 3 provides two???way communications with the vehicle so that information about the vehicle (e.g., location, automatic debiting of tolls, etc.), as well as emergency calls, can be
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