| Title | Estimation of Traffic Variables Using Point Processing Techniques |
|---|---|
| Record ID | 49890 |
| Personal Name Creator |
Lopez, R. L.; Houpt, P. K. |
| Source | 80p. in various pagings |
| Corporate Creator | Massachusetts Institute of Technology |
| Corporate Contributor |
John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Dept. of Transportation. Research and Special Programs Administration |
| Publication Date | 19780501 |
| Language | English |
| Abstract | An alternative approach to estimating aggregate traffic variables on freeways--spatial mean velocity and density--is presented. Vehicle arrival times at a given location on a roadway, typically a presence detector, are regarded as a point or counting Poisson process whose rate is a function of the state of the traffic at every instant of time. Moreover, the traffic state is modeled as a finite-state Markov chain. A sequential point process filter, optimum in the mean-squared error sense, is designed to estimate the state from observations of the vehicle arrival-time sequence. Different possibilities for incorporating potential additional information such as speed and headway are explored. Parameter values for the underlying Markov chain are obtained via a maximum likelihood estimator. Qualitative behavior of the proposed algorithms is studied with simulated traffic flow data from both macroscopic and microscopic models. |
| Rosap ID | dot:11301 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/11301 |
| TRT Terms | Algorithms; Estimates; Freeways; Highway traffic; Markov chains; Mathematical models; Stochastic processes; Traffic control; Traffic density; Traffic engineering; Traffic flow; Traffic measurement; Traffic simulation; Traffic speed; Vehicle detectors |
| Classification | NTL - OPERATIONS AND TRAFFIC CONTROLS - Traffic Flow; NTL - OPERATIONS AND TRAFFIC CONTROLS - OPERATIONS AND TRAFFIC CONTROLS; NTL - HIGHWAY/ROAD TRANSPORTATION - HIGHWAY/ROAD TRANSPORTATION |
| Geographical Coverage |
United States |
| Report Number | DOT-TSC-RSPA-78-9 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/49000/49800/49890/DOT-TSC-RSPA-78-09.pdf |
| Format | |
| Database | NTL Digital Repository |