simon gelinas - ontimetravlr.com
Post on 07-Aug-2015
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ononTimeTravlrTimeTravlr
Simon GélinasSimon Gélinas
Because everyone loves getting stuck in trafficBecause everyone loves getting stuck in traffic
173 million taxi entries173 million taxi entries (~30gb) - Chris Whong FOIL (~30gb) - Chris Whong FOIL
Traffic data for ~1500 street segmentsTraffic data for ~1500 street segments - NYC open data - NYC open data
Raw data on Google BigQuery
Clean up
Extract patterns
Anomaly detection
Traffic Data: Traffic Data: Finding the underlying patterns Finding the underlying patterns
using singular value decomposition (SVD)using singular value decomposition (SVD)R
oad
ID #
Extremely strong within-week correlation!
Mon
Tu
e
W
ed
T
hu
F
ri
Sat
S
un
Mon - Tue - Wed - Thu - Fri - Sat - Sun
Reconstructed Geodata - TimeseriesReconstructed Geodata - Timeseries
Fast and accurate solution for websiteFast and accurate solution for website
Google map prediction
Scientific work published in: Nature (2013), Science (2014), Nature Materials (2014)
Simon GélinasSimon Gélinas
Traffic speed vs car densityTraffic speed vs car density
not very linear!not very linear!
Few cars → lots of cars
Fas
t
→
Slo
w
Traffic Data: Traffic Data: Position of Road ID # Position of Road ID #
Road ID #
MonTueWedThuFriSatSun
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