VEHICLE INTELLIGENCE & TRANSPORTATION ANALYSIS LABORATORY
    University of California, Santa Barbara

Forecasting Travel Demands of Demographic Groups—An Optimal Resource Allocation Tool

Preliminary findings: Workers and Accessibility Maps

Initial analysis focuses on four geographic areas: (a) Los Angeles-Orange County, (b) San Francisco Bay, (c) Santa Barbara County, (d) all California. Maps for Santa Barbara County are currently highly generalized because there are few census tracts in the area compared with Los Angeles and San Francisco. In a later phase of the project, Santa Barbara County will be studied in greater depth, at finer geographic resolution.

1. Numbers of workers in the following categories are mapped at their place of work, based on NAICS (formerly SIC) encoded data from the Census Transportation Planning Package (CTPP):



Edu/Health
Manuf
Public Admin
Retail
Other
Los Angeles/Orange
Map Map
Map
Map
Map
San Francisco/Bay
Map Map Map Map Map
Santa Barbara
Map Map Map Map Map

2. Travel time is estimated by analyzing stated travel time in the CTPP. The CTPP reports two average travel times, peak and off-peak, from each census tract to every other. The faster of the two is applied for accessibility modeling. For each origin census tract, the maps show the number of workers in each of the above occupation sectors that can be reached in 20, 40 and 60 minutes. This is a preliminary measure of accessibility to services in the various sectors, from each origin tract.


Edu/Health
Manuf
Public Admin
Retail
Other
Los Angeles/Orange
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
San Francisco/Bay
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
Santa Barbara
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
California
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min
20 min
40 min
60 min


Further information

Kostas Goulias goulias@geog.ucsb.edu
Val Noronha noronha@ncgia.ucsb.edu