Day-to-Day Travel-Time Trends and Travel-Time Prediction from Loop-Detector Data
- 1 January 2000
- journal article
- research article
- Published by SAGE Publications in Transportation Research Record: Journal of the Transportation Research Board
- Vol. 1717 (1), 120-129
- https://doi.org/10.3141/1717-15
Abstract
An approach is presented for estimating future travel times on a freeway using flow and occupancy data from single-loop detectors and historical travel-time information. Linear regression, with the stepwise-variable-selection method and more advanced tree-based methods, is used. The analysis considers forecasts ranging from a few minutes into the future up to an hour ahead. Leave-a-day-out cross-validation was used to evaluate the prediction errors without underestimation. The current traffic state proved to be a good predictor for the near future, up to 20 min, whereas historical data are more informative for longer-range predictions. Tree-based methods and linear regression both performed satisfactorily, showing slightly different qualitative behaviors for each condition examined in this analysis. Unlike preceding works that rely on simulation, real traffic data were used. Although the current implementation uses measured travel times from probe vehicles, the ultimate goal is an autonomous system that relies strictly on detector data. In the course of presenting the prediction system, the manner in which travel times change from day to day was examined, and several metrics to quantify these changes were developed. The metrics can be used as input for travel-time prediction, but they also should be beneficial for other applications, such as calibrating traffic models and planning models.Keywords
This publication has 8 references indexed in Scilit:
- Metamodels for estimating waterway delays through series of queuesTransportation Research Part B: Methodological, 1998
- Forecasting Multiple-Period Freeway Link Travel Times Using Modular Neural NetworksTransportation Research Record: Journal of the Transportation Research Board, 1998
- Vehicle Re-Identification and Travel Time Measurement in Real-Time on Freeways Using Existing Loop Detector InfrastructureTransportation Research Record: Journal of the Transportation Research Board, 1998
- I-880 Field Experiment: Data-Base Development and Incident Delay Estimation ProceduresTransportation Research Record: Journal of the Transportation Research Board, 1996
- An On-Line Dynamic Traffic Prediction Model for an Inter-Urban Motorway NetworkPublished by Springer Science and Business Media LLC ,1995
- System Optimal Dynamic Assignment for Electronic Route Guidance in a Congested Traffic NetworkPublished by Springer Science and Business Media LLC ,1995
- Modern Applied Statistics with S-PlusStatistics and Computing, 1994
- Dynamic network models and driver information systemsTransportation Research Part A: General, 1991