@article{ref1,
title="Practical problems in traffic assignment and strategies for users",
journal="Indian highways",
year="2005",
author="Singh, I.",
volume="33",
number="9",
pages="81-99",
abstract="The paper presents an overview of the traffic assignment process and summarises the practical problems faced by users of traffic-assignment models. The five elements in the application of computerised traffic-assignment are described: network preparation (intersections, interchanges, centroids and connectors), establishing the origin-destination (O-D) demands, identifying a traffic-assignment technique; calibrating and validating the model; and forecasting. The problems associated with traffic assignment include network representation problems (micro-macro network coding, coding of permissible U-turns), coding of operational strategies, the level of details and network aggregation, system-subarea data translation problems, the refinement of computerised traffic-volume forecasts, traffic data for more detailed networks, model calibration problems (base-year O-D Matrix, network representation, assignment techniques, link-performance functions), and forecasting problems (traffic volumes for different forecasting years, checking accuracy of traffic forecasts, site-impact studies).<p />",
language="",
issn="0376-7256",
doi="",
url="http://dx.doi.org/"
}