A system is disclosed that features a transport vehicle in which a responsive object is present, such as a truck in which a cellphone is present, in which the object is equipped to provide location or other state information when queried. The transport vehicle is outfitted with a proxy that represents the responsive object. The proxy is configured such that it is better able than the responsive object to estimate the responsive object's location or state. The vehicle is also outfitted with i) sensors that detect the responsive object and ii) sensors that detect state information of the vehicle. The object sensors are able to query the object in the same way as the querying device would query that object in the prior art. Using information from the sensors, the proxy then responds to the query on behalf of the responsive object, and an authentication device processes the query.