MAKING VISIBLE THE INVISIBLE - European Commission · Shuttle is the best choice for ~75.000 riders...

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MAKING VISIBLETHE INVISIBLETHE L TRAIN CLOSURE

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Jorge Sanz · · jorge@cartodb.com @xurxosanz

Eurostat 2016 Visualization Workshop

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AGENDAProblem de�nitionCurrent statusProposed solutionTechnology

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ABOUT USCartoDB: location intelligence SaaSSince 2011~100 employeesO�ces in Madrid, NYC and Tartu~200K users

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PROBLEMDEFINITION

After Sandy hurricane, the NY Canarsie tunnel wasa�ectedAuthorities (MTA) are planning to shut down the Ltrain lineThis situation can last yearsHow this line shutdown will a�ect to New Yorkers?

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OVERVIEW THE L TRAIN

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OVERVIEW THE L TRAIN

Major connection between Manhattan an Brooklyn~27.000 passenger per workday (2014 data)With its modern signaling, L line can have moretrains

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CURRENT STATUS

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DATA AVAILABLEDemographics from

Home and work dynamics from

American Community Survey(ACS)

LODESL entrances

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ANALYSIS

Objective: study the relation betweenpeople from Brooklyn commuting to

Manhattan and the L line.

Census blocks as base geographic informationRelation with L entrances using walking route and travel time

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WALKING PATHS

Map of number of Brooklyn walkers using L train within a 30 minutes range

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COMMUTING TIME

~500K people from Brooklyn work at Manhattan~200K L Train commuters per day~114K use the L train to work at Manhattan

People try to live close to their jobs

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SCENARIOCLOSING THE CANARSIE

TUNNEL

AFFECTED POPULATION

L is the closest line for ~19K low incomehouseholds

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AFFECTED POPULATION

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AFFECTED POPULATION

Most a�ected areas would be Brownsville and East New YorkMore wealthy population can look for other transport methods (uber, lyft)MTA suggested bus shuttles

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PROPOSEDSOLUTION

Bus shuttles to substitute the Canarsietunnel

Williamsburg to Lower East Side~20 minutes rideIs it worth?

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BUS SHUTTLE: BEST CHOICE?

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BUS SHUTTLE: BEST CHOICE?

Shuttle is the best choice for ~75.000 riders per day

1154 bus rides (65 pax/bus)One bus every 90 secondsThis almost means NYC needs a new bridge!!

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INCREASING BUS TIME

Shuttle are only interesting if they take less than 29minutesThen all commuters would better use M line

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TECHNOLOGY

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CARTODB AS AN ANALYSISPLATFORM

Postgres + PostGISMapzen Valhalla routing exposed as SQL functionsCustom python functions embedded

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CARTODB DATA SERVICES APIExpose third party services through SQL:

Geocoding: Mapzen, HERE, GoogleRouting: MapzenTrade Areas: HERE

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EXAMPLE: GEOCODING +ROUTING

SELECT   st_transform(shape, 3857) as the_geom_webmercator FROM cdb_route_point_to_point(   cdb_geocode_street_point('Calle Moreno Nieto, 2, 28005 Madrid'),   cdb_geocode_street_point('fernandez de la hoz 35, madrid'),   'car',   ARRAY['mode_type=shortest']::text[] ) 

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TECHNOLOGY: GEOCODING +ROUTING

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LOOKINGFORWARD

A beter UIReference dataMore analysis functions, beyond PostGISBetter LDS

For everyone, everything athttps://github.com/CartoDB/

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THANKS!MAKING VISIBLE THE

INVISIBLE: THE L TRAIN CLOSURE

Jorge Sanz · · jorge@cartodb.com @xurxosanz

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CREDITSL-TrainCanarsie tunnel