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

Aggregated seasonal trendsAggregated seasonal trends

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

TEMPLATE: main point TEMPLATE: main point

some detailssome details