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1 Drogi : budownictwo infrastrukturalne

1 2012

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Modelowanie natężenia ruchu na drogach lokalnych w stanie Indiana

Tarko A., Szarata A.

Drogi : budownictwo infrastrukturalne

2012

Nr 12 (12)

40-47

Referat przedstawia problematykę modelowania pracy przewozowej dotyczącej ruchu drogowego dla dużych obszarów. Jako przykład posłuży tutaj stan Indiana, dla którego opracowano podejście pozwalające oszacować pracę przewozową wyrażoną w pojazdo-milach.

This paper presents a method of estimating the travel demand and vehicle miles traveled in large regions including local roads. The model calibration and evaluation is presented for example parts of Indiana. In the traditional approach, a network demand model includes properly calibrated traffic generation components applied to Traffic Analysis Zones and traffic exchange relationships between these zones calibrated based on household survey results. This paper attempts to calibrate a model that does not use the household survey but, instead, uses carefully chosen exploratory variables. The model is founded on a number of simplifying assumptions allowed by disaggregation of a large regional road network into much smaller parts called clusters. The network demand estimation could be then conducted for each cluster separately. The traffic generation parameters were fitted with a heuristic search method (genetic algorithm) and the values of exploratory variable; (number of residents, employees, etc.) were obtained from microscopic GIS data. The calibrated model was evaluated by comparing the estimated daily traffic volumes with the values obtained from vehicle counting. This paper presents the model assumptions and the results obtained for a sample part of the road network.