1. Chattanooga Transportation Data Collection Review
November 29, 2018

2. Data Needs Regional Transportation Plan / Travel Demand Model
Transportation Improvement Plan (TIP)
Congestion Management Process (CMP)
Performance Measures

3. Phase I Phase II 2014, 2015, better budget planning
Exclude socio-economic data

4. Recommendations Data Item 2014 2015 2016 2017 2018 2019 2020 Total
Travel time data
$67,000
$22,000
$199,000
Cell phone O/D data
$80,000 $0
$50,000
$130,000
Automatic License Plate Reader (ALPR) Surveys
$30,000
$60,000
Truck GPS data
$42,000
$25,000
Truck Roadside Intercept data
$20,000
$15,000
$35,000
Household Travel Survey
$250,000
Transit On‑Board Survey
$100,000
Transit Stated-preference Survey
$200,000
Supplementary Traffic Count Data
$40,000
Expanded Bike Counts
Vehicle Occupancy Field Counts
Total for individual years
$409,000
$382,000
$302,000
$1,181,000
Cumulative Total
$431,000
$453,000
$475,000
$857,000
$879,000
Recommendations

5. Data Item 2014 2015 2016 2017 2018 2019 2020 Total Travel time data
$67,000
$22,000
$199,000
Cell phone O/D data
$80,000 $0
$50,000
$130,000
Automatic License Plate Reader (ALPR) Surveys
$30,000
$60,000
Truck GPS data
$42,000
$25,000
Truck Roadside Intercept data
$20,000
$15,000
$35,000
Household Travel Survey
$250,000
Transit On‑Board Survey
$100,000
Transit Stated-preference Survey
$200,000
Supplementary Traffic Count Data
$40,000
Expanded Bike Counts
Vehicle Occupancy Field Counts
Total for individual years
$409,000
$382,000
$302,000
$1,181,000
Cumulative Total
$431,000
$453,000
$475,000
$857,000
$879,000

6. Travel Time Data $55,000 MS2/HERE
51 high priority corridors; 6,999 links
Every day in timeframe, 15 minute increments
Speed (avg., min., max., free-flow, percentiles) and Confidence Score
109 GB of data!
Comparison to 60 GPS-based travel time runs on five corridors
Data mostly valid
Caution for data from rural-low volume roadways
$55,000

7. Origin-Destination (OD)
Airsage
November 2014 data
728 zones including 20 external zones
3 trip purposes, resident/visitor designation
Validations checks performed
Higher trips rates, but overall valid trip distribution patterns
One irregularity near external stations on east side of area
$57,000

8. Truck Origin-Destination (OD) Data
Six locations
Trip origin and destination
Freight facilities
Commodity Mix
Other
$35,000

9. Supplemental Traffic Counts
Classified traffic counts at 95 locations, 2 directions each
Motorcycles, Passenger Cars and Trucks, Buses, Single Unit Trucks, Combination Trucks
at least 24 hours, 48 hours in some locations
at least 1 hour, 15 mins in some locations
Supplements non-classified counts from TDOT/GDOT
$42,000

10. On-board Transit Survey
FTA Requirements
Partnered with CARTA
Fixed routes and two shuttle routes
$15,000

11. Next Data Acquisition 2019- 2020
Travel Time Data: INRIX, HERE, NPMRDS
OD Data: AirSage, StreetLight
Travel Behavior: Traditional Household Survey, NHTS, Innovative Household survey
Employment data
Potential partners: TDOT, GDOT and other MPOs in TN and GA

12. Considerations Procurement requirements Time schedule Funding / cost
Data validation
Data Coverage and Representation
Network conflation