Return to Travel and Land Use Forecasting  Travel and Land Use Forecasting    Project Summary :: 1  2  3  4  5   Project Background The City of Concord, New Hampshire’s capital (NH), is served by three major interstates (I-93, I-89, I-393), US 3 and six major NH highways (4, 9, 13, 106, 132, 202) with continuously growing traffic demands. Resource Systems Group developed the Concord Model, an integrated transportation demand model, for the Central New Hampshire Regional Planning Commission. The Concord Travel Demand Model Update expanded an existing traffic model of the City to include eleven surrounding municipalities. This expanded model was calibrated for AM and PM peak hour conditions. The expanded, improved model features the Quick Response System II (QRS II) software and Integrated Transportation Modeling (ITM) software developed by Resource Systems Group. AM and PM models were developed to estimate traffic and transit flow within the region. For the purposes of modeling traffic flow, the completed model includes 214 internal Transportation Analysis Zones (TAZs) covering twelve towns in the model area. Traffic entering and exiting the region is modeled through 26 external zones. Project Scope •  Trip Generation Model: The trip generation module computes trip ends based on land use categories and trip types (i.e. Home-to-Work, Home-to-NonWork etc.). •  Trip Distribution Model: The Concord Model includes a custom logit distribution module. Use of the logit-based distribution module provides a higher level of internal model consistency. •  Mode Choice Model: Estimated from local revealed and stated preference data, including bus, carpool, and walk/bike modes. •  Assignment Model: The assignment module uses QRS II software. The method of successive averages (MSA) is used to do the traffic assignment. Project Results The Concord Model can be used to evaluate two types of network modifications:     •  transportation improvements such as new capacity, intersection signalization and one-way street designations; and     •  large land use changes such as housing developments, shopping complexes and office parks. Immediate uses will include evaluating statewide improvement projects and major I-93 upgrades between exits 13 and 16.