Patent ID: 8135614

Claim:
A system configured to conduct transactions with vehicles traveling on a road, comprising: a first RF source configured to communicate with RF transponders in a first area on a road; a second RF source configured to communicate with RF transponders in a second area on the road, wherein the first area is different from the second area; and one or more processors operatively coupled to the first RF source and the second RF source, and configured to complete a tolling transaction with an RF transponder carried by a vehicle, wherein completing the tolling transaction comprises completing a set of communications with the RF transponder, and wherein the processor is configured to complete the tolling transaction by: attempting to complete the set of communications with the RF transponder via the first RF source, and responsive to failure to complete set of communications with the RF transponder via the first RF source, conducting at least a portion of the set of communication with the RF transponder via the second RF source.