1. Determine and Assign Area Type for Network Links Using GIS Technology
Petya Maneva (presenter)
and
Wang Zhang
May 9, 2013

2. Area Type in Travel Demand Modeling
Based on employment and population
As a link attribute in transportation network, area type affects :
roadway’s capacity
free-flow speed
possible travel delay

3. What Makes This Approach Different?
Additional New Inputs:
Share of developed area for each TAZ
Big retail centers
High number of university students
Large and scarcely populated areas
New Technique:
Intensity surface using spatial interpolation technique
Additional New Inputs:
Share of developed area for each TAZ
Big retail centers
High number of university students,
Large and scarcely populated areas
New Technique:
Intensity surface using spatial interpolation technique

4. The Methodology in a Nutshell
Determine initial economic intensity using a larger set of variables
Correct for special cases such as retail centers
Interpolate among centroids of developed areas
Go from continuous to categorical variables
Transfer area type values from polygons to links

5. Generate Intensity Surface
Continuous Economic Intensity Surface
Kernel Interpolation with barriers. Epanechnikov, 4 miles bandwidth.

6. Area Type Polygons

7. Area Type at the Network Links Level

8. Implementation
A fusion of:
Python
ESRI ArcObjects
Caliper GISDK

9. Model Validation Improved
Central Business District

10. Model Validation Improved
Outlying Central Business District

11. Model Validation Improved
Mixed Urban Area Type

12. ? pmaneva@azmag.gov 602 452-5075 Petya Maneva wzhang@azmag.gov
Wang Zhang