Supporting Documents:
Related Websites:
GPS-ATD
(Global Positioning System -
Automated Travel Diary)
What is the GPS-ATD?
The GPS-Automated Travel Diary (GPS-ATD) will improve the performance of the household travel survey. This project will provide transportation planners and modelers with more complete and accurate traveler behavior and mode choice information. The GPS-ATD is being developed in a partnership with AHMCT at UC Davis.
Who Uses the GPS-Automated Travel Diary?
Transportation Planners, Modelers, TSI staff, Caltrans Districts, DOTP, Division of Mass Transportation, Division of Aeronautics, Division of Rail, BT&H, ARB, CHP, Legislators, MPOs, regional and local agencies.
Customer Expectations
Our customers expect our branch to:
- Produce accurate travel behavior information with the GPS-Automated Travel Diary to be used in Travel Demand Models,
- Use statistical survey methods for computing inter-regional and regional trips with the GPS-Automated Travel Diary,
- Follow procedures and guidelines while using the GPS-ATD devices to collect traveler information, and
- Provide GPS travel survey information that is applicable to Caltrans Divisions of Planning, Mass Transportation, Rail, and Aeronautics.
Performance Objectives
We oversee the quality of our data by:
- Conducting field tests of equipment to ensure reliability.
- Checking for quality control throughout the project.
- Discussing our results with users to determine their level of satisfaction.
Contact Person:
Mohammad Assadi
Phone: (916) 654-4238
Email: mohammad.assadi@dot.ca.gov