1. Hennepin County Transportation Systems Plan (HC-TSP) Traffic Forecasting Model

2.  Model initially developed in 1997-98  Derived from Met Council Regional Model  Minor Updates in 2000 & 2002  Conversion from TRANPLAN / TransPro to TransCAD begun in 2004 Background

3. Model Features  Land Use Based (sq-ft, Dwelling Units, etc.) – linked to Countywide parcel database  Strong GIS Linkage (ArcGIS)  Only Vehicle Trips Modeled  3-Purposes for Trip Productions / Attractions (HBW, HBO, NHB)  Trip Generation via ITE trip rates

5. Model Characteristics  To accurately depict Arterials – must model one level below (to collector street level) – this requires 50% increase in nodes / links

6. Model Characteristics  Huge databases to manage (parcel database 350,000+ records)

7. Model Characteristics  Met Council TAZ’s split about 3:1 500 Met Council TAZ -> 1,500 HC TAZ

8. Model Characteristics  High level of ADT calibration

9. Why TransCAD ?  Some previous familiarity with the package – had dabbled with Demo copy in 2003-04  Local Road Research Board Project in 2004 – Snowplow routing (2 licenses purchased)  Package had ITE Trip Generation built-in  Good GIS compatibility with ArcView

10. Status of Model Refinements  Existing Land Use verification completed (required 1-1/2 year effort)  TAZ’s refined – parcels allocated to both Met Council and Hennepin County TAZ’s  First attempt for existing trip generation completed

13. Schedule