Title :
Monitoring a metropolitan freeway system using probe vehicles and random access radio channel
Author :
Linnartz, Jean-Paul M G ; Westerman, Marcel
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
The lack of proficient real time traffic monitoring systems is one of the major bottlenecks of Advanced Traveller Information Systems (ATIS) and Advanced Traffic Management Systems (ATMS). The authors describe and analyze the performance of a method for collecting real-time traffic data from probe vehicles automatically sending traffic reports to one or more base stations, connected to a traffic center by a wired communications network. The results reveal that random access (ALOHA) transmission of traffic reports is a (spectrum) efficient, inexpensive and flexible method for collecting road traffic data and that this approach can provide reliable traffic monitoring. Not only highly accurate real time link travel times can be estimated, but also Automatic Incident Detection (AID) can be performed
Keywords :
access protocols; channel capacity; data communication; land mobile radio; radio links; real-time systems; road traffic; AID; ALOHA transmission; ATIS; ATMS; Advanced Traffic Management Systems; Advanced Traveller Information Systems; Automatic Incident Detection; metropolitan freeway system; performance; probe vehicles; random access radio channel; random access transmission; real time traffic monitoring systems; road traffic data; wired communications network; Base stations; Communication networks; Management information systems; Monitoring; Performance analysis; Probes; Real time systems; Road vehicles; Telecommunication traffic; Traffic control;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345032
