Patent ID: 7768427
Filing Date: 2010-08-03
Classification: G01S,G08G

Abstract:
1. A method for obtaining vehicular traffic data using a traffic sensor having an antenna/transceiver module, a DSP and a microcomputer, the method comprising: (a) transmitting radiation at vehicles on a roadway; (b) receiving the radiation reflected back from the vehicles; (c) producing a stream of electrical signals based on the radiation reflected back from the vehicles; (d) processing the stream of electrical signals using the DSP to determine if a vehicle detection threshold is met, and, if the vehicle detection threshold is met, to determine an initial vehicle position; (e) when the vehicle detection threshold is met, generating a first signal representing the initial vehicle position using the DSP; (f) transmitting the first signal to the microcomputer (g) deriving a first traffic information signal from the first signal using the microcomputer; (h) transmitting the first traffic information signal to an external traffic management system.