| 摘要 |
This invention provides a system (190) and method for mapping parameters of a traffic congestion, for example, a road congestion, relative to a focus. Mapping of the road congestion may include determination of an average lengt h of the road congestion over a time interval, motion rate in the road congestion, and arrival rate to the road congestion. The mapping system (190 ) may construct snapshots of mapping samples received from a small percentage of probe vehicles (230) equipped with an appropriate receiver and transmitter. The mapping samples are preferably received in response to predefined broadcast queries sent by a central station (206). The determination of the average length of a road congestion may be based on a direct approach, obviating the need to estimate discrete lengths of the road congestion.</SDO AB>
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