Methods and systems of monitoring traffic flow
First Claim
1. A method of monitoring traffic flow, comprising reading registration plates of the vehicles of a first series of vehicles passing a first location along a road, selecting a sample of readings from the readings relating to the respective vehicles of the series, reading the registration plates of the vehicles of a second series of vehicles passing a second location along said road, and determining whether readings of said sample are deemed to be present in the readings relating to the respective vehicles of said second series.
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Accused Products
Abstract
A method of monitoring traffic flow comprises reading registration plates of the vehicles of a multiplicity of series of vehicles passing respective locations on a road network, if necessary selecting samples of readings from the readings relating to the vehicles of the series, and determining whether readings of the samples are deemed to contain matching readings. The samples are used as probes or targets to measure average journey times which are compared with reference journey times. The selecting of the samples at the respective reading locations is performed according to an algorithm common to all of the locations.
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Citations
24 Claims
- 1. A method of monitoring traffic flow, comprising reading registration plates of the vehicles of a first series of vehicles passing a first location along a road, selecting a sample of readings from the readings relating to the respective vehicles of the series, reading the registration plates of the vehicles of a second series of vehicles passing a second location along said road, and determining whether readings of said sample are deemed to be present in the readings relating to the respective vehicles of said second series.
- 19. A system for monitoring traffic flow, comprising first reading means serving to read registration plates of the vehicles of a first series of vehicles passing a first location along a road, second reading means serving to read registration plates of the vehicles of a second series of vehicles passing a second location along said road, and selecting and determining means serving to select a sample of readings from the readings relating to the respective vehicles of said first series and serving to determine whether readings of said sample are deemed to be present in the readings relating to the respective vehicles of said second series.
Specification