2015 D-STOP Symposium session by the Network Modeling Center's Ken Perrine. Watch the presentation at http://youtu.be/sSotvhKg3Wc?t=47m44s Get symposium details: http://ctr.utexas.edu/research/d-stop/education/annual-symposium/

1. COLLABORATE. INNOVATE. EDUCATE.
Matching GTFS Transit Route Data to
a Roadway Network for Travel
Modeling
Kenneth A. Perrine
Research Associate
Monday, March 2, 2015

2. COLLABORATE. INNOVATE. EDUCATE.
Google Maps

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Google Maps
GTFS Shape
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Roads?
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Google Maps

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Google Maps

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Google Maps
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Google Maps

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Google Maps
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Google Maps
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Google Maps
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Google Maps
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Google Maps
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Google Maps

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*Google Maps

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Google Maps
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Global & local
Multiple hypotheses
Topological
Heuristic-free

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GTFS
shapes
Initial
match
Simulator files
Underlying
topology
Fix underlying
topology
Problem
report
Workflow
Refine
matches
Problem
report
Good
enough?
Y
N

21. COLLABORATE. INNOVATE. EDUCATE.
OpenStreetMap
• 123,046 nodes
• 300,199 links
NMC CAMPO DTA
• 11,393 nodes
• 13,353 links
Austin Region
Google Maps

22. 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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23. COLLABORATE. INNOVATE. EDUCATE.
GPS 1-sec over
NMC CAMPO DTA
• Discontinuities: 0
• Accuracy: 100%
CapMetro GTFS over
NMC CAMPO DTA
• Discontinuities: 0
• Accuracy: 95.9%*
• (Had to fix 80 links!)
CapMetro GTFS over
OpenStreetMap
• 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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24. COLLABORATE. INNOVATE. EDUCATE.
Open source!
http://ctr.utexas.edu/nmc/nmc-map-matcher
Kenneth Perrine
kperrine@utexas.edu