1. Results and Lessons-Learned from the 2016 Dallas-Ft
Results and Lessons-Learned from the 2016 Dallas-Ft. Worth New Technology O-D Study
Texas A&M Transportation Institute
Ed Hard, TTI
Arash Mirzaei, North Central Texas Council of Governments
TRB National Transportation Planning Applications Conference
Tuesday, May 16, 2017
Research Sponsored by:

2. Study Area and Overview
External O-D study using cell, GPS, and Bluetooth data
North Central Texas Council of Governments (NCTCOG), 13-county Dallas-Ft. Worth modeling region
Broader study area covers about 10,000 square miles, over 48 counties with close to 9 million residents.

3. Base Data Bluetooth readers at 50 locations Cellular (Airsage)
300,000 reads, 20,400 matches (unexpanded)
Cellular (Airsage)
33.2 million weekday trips
GPS (INRIX)
29 million trips (82% Truck, 8% Car)
1.6 billion waypoints

4. Methodology – Cell Data
External stations determined using Select Link Analysis with a detail coded external and internal highway network
Select Link allowed objective determination of probable routes.
DFW – External Traffic Assignment of Cell Data

5. External Trip Generation per Track

6. Methodology - GPS Data No
Trip ID 1
Yes
Trip ID 2
GPS Data filtered using an AWS instance of PostgreSQL/PostGIS and Elastic Map Reduce (Hadoop/Spark)
Custom route matching algorithm matches 99% of external trips to an external station – using a 3 feature KNN search
Frontage
Local
Main

7. GPS External to External Travel Times

8. Preliminary Results Data E-E E-I/I-E GPS Cars 7.4% 92.7% GPS Trucks
Cellular Data
Data
E-E
E-I/I-E
GPS Cars
7.4%
92.7%
GPS Trucks
13.0%
87.0%
GPS Total
8.8%
91.2%
Cellular
7.6%*
92.5%*
Bluetooth
6.8%
GPS Data
* Based on 24-hour period

9. Findings/Lesson’s Learned
Findings consistent with previous studies, such as TMIP Guidebook
Cell and GPS needed to develop external data
Agencies need to invest in technical resources and professionals to analyze passive data
In-house, in-depth understanding of data critical
Just scratching surfaces of data value/uses

10. Acknowledgments and Special Thanks!
Bill Knowles
Janie Temple
Christeen Pusch
Byron Chigoy
Michael Martin
Steve Farnsworth
Bill King
Vijay Sivaraman
Rick Schuman
Ted Trepanier