Traffic monitoring and management method and apparatus

CAFC
  • US 5,289,183 A
  • Filed: 06/19/1992
  • Issued: 02/22/1994
  • Est. Priority Date: 06/19/1992
  • Status: Expired due to Term
First Claim
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1. Apparatus for the analysis and management of vehicle traffic along a roadway comprising,a plurality of transceivers positioned adjacent to said roadway, each of said transceivers including means for transmitting radio frequency signals toward said roadway, said signals including information signals including a location of said transceiver, and a current date and time,a plurality of transponders, each of said transponders being located in separate ones of said vehicles passing along said roadway, each of said transponders including a data processor, a memory, and a receiver/transmitter, intercoupled such that said information signals transmitted from said transceiver can be received, and processed in said data processor and at least a subset of said information signals can be stored in said memory in at least one of, received and processed form, andindependent data processor means coupled to said transceiver for two-way communication with said transceiver, andwherein said memory includes means for storing a first said current date and time received from a first one of said transceivers, and said apparatus includes a second one of said transceivers, positioned downstream from said first transceiver and including means for signaling said transponders to transmit said first current date and time to said second transceiver.

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