Using TRANSIMS, this project will develop a person based, tour based travel forecasting simulation of the Portland Region.
The deployment in Portland will demonstrate TRANSIMS capability to model Portland conditions. The deployment will be conducted in a manner which fully documents the data preparation, model development and software development. A group of external reviewers will periodically provide user feedback to DOT on the Portland model development.
The Portland application of TRANSIMS consists of two parts:
Track 1 – Network analysis using the Router and Microsimulator
Status – We are currently working toward 100% assignments of traffic on the Portland all streets network, 125,000 links. As the network becomes more congested errors are identified in network coding and corrections made. In the process of Track 1 we have identified simplified methods of network coding and other techniques which will support future applications of TRANSIMS.
Status: We expect to complete this in December or early January. We have made modifications to the microsimulator to correct problems with lost vehicles and are in the process of testing these.
Track 2 – Develop travel forecasting model using full TRANSIMS capability
Status – We have specified the population generation and have tested a tour based model which uses existing activity survey data and current trip distribution models. A mode split model has also been specified. We have linked the synthesizer, activity and location choice models and mode choice models. In January we expect to begin running these models in combination with the Router and Microsimulator.
Portland METRO staff is currently running calibrations on the mode choice and destination choice models.
There are five contractors in the Portland deployment:
Model implementation – Portland METRO
Oversight Support– AECOM
Software Support – IBM (Formerly Pricewaterhouse)
Core Technology Ssupport – LANL
Technical Working Group (User Feedback) - TTI and DOT staff
The activities of these contractors are described separately
Develop Travel forecasting Model in Portland Using TRANSIMS
Ducca
Ongoing