matching gtfs transit route data to a roadway network for travel modeling
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COLLABORATE. INNOVATE. EDUCATE.
Matching GTFS Transit Route Data to
a Roadway Network for Travel
Modeling
Kenneth A. PerrineResearch Associate
Monday, March 2, 2015
COLLABORATE. INNOVATE. EDUCATE.
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*Global & local
Multiple hypotheses
Topological
Heuristic-free
COLLABORATE. INNOVATE. EDUCATE.
GTFS shapes
Initial match
Simulator files
Underlying topology
Fix underlying topology
Problem report
Workflow
Refine matches
Problem report
Goodenough?
Y
N
COLLABORATE. INNOVATE. EDUCATE.
OpenStreetMap• 123,046 nodes• 300,199 links
NMC CAMPO DTA• 11,393 nodes• 13,353 links
Austin Region
Google Maps
COLLABORATE. INNOVATE. EDUCATE.
CapMetro GTFS• 84 routes• 170 shapes• 45,476 points• 1,383 miles• 2 in - 3472 ft apart
(avg. 161 ft) GPS 1-sec• 22 routes• 44 journeys• 44,298 points• 283 miles• 0 to 114 ft apart
(avg. 34 ft)
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COLLABORATE. INNOVATE. EDUCATE.
GPS 1-sec overNMC CAMPO DTA• Discontinuities: 0• Accuracy: 100%
CapMetro GTFS overNMC CAMPO DTA• Discontinuities: 0• Accuracy: 95.9%*• (Had to fix 80 links!)
CapMetro GTFS overOpenStreetMap• Discontinuities: 0• Accuracy: 99.8%*• (Had to fix 1 link!)
RESULTS
* In hand-checked cases, 3,068 of 45,476 GTFS points
FUTURE
Link curvature
Compute speed
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