Seattle Mobility Index Project Final Presentation...

Mobility

Akoly Vongdala Ryan MaasSteve Barham

Student Fellows

Data ScientistsCity of Seattle

Rebeca de Buen Kalman Darius Irani Hyeon Jeong (HJ) Kim Amandalynne Paullada Woosub Shin

Alex Hagenah Joseph Hellerstein

What is mobility?

The ability to reach everyday destinations with your choice of mode, affordably and reliably.

Google Distance

Matrix API

PSRCHousehold Travel

SurveyCity of Seattle

Open Data

From mobility to mobility

CensusEmployment

Data

Raw Mobility Data: Google Maps APIDistance & duration for multiple destinations and transport modes

Duration and DistanceEstimate travel time and distance based on a

recommended route.

Modes of TransportSpecify the mode of transport to use when calculating distance and travel

time.

TrafficUse current and historical traffic to

predict travel times.

23 Min.4.7 Miles

Calibration and Training Data: PSRC Survey3,000 households30,000 trips

Trip AttributesTime

DistancePurpose

ModeBlock Group

Household AttributesIncome

HomeownershipRace

GenderDistance

Puget Sound Regional CouncilHousehold Travel Survey

Measure and identify disparity in mobility to drive policy

Measure and identify disparity in mobility

§ Understand mobility at a granular level

§ Provide baseline mobility measures

§ Quantify impact of changes in transportation systems

Where do people go?

DestinationsOrigins

Unit of Analysis: Census Block Group

§ Granular geographic division

§ Typically 600-3000 people

§ Seattle: 481 block groups

Origins

school supermarket destination park

post office cafepharmacy

libraryhospitalurban village

LOCAL LOCATIONS CITYWIDE LOCATIONS

employment center

public college

point ofinterest

Destinations

§ Best-scoring combination of destinations informed by PSRC Household Travel Survey and Census employment data

§ Final basket: 12 local and 13 citywide destinations

Market Basket of Destinations

AffordabilityIndex

Mode ChoiceIndex

ReliabilityIndex

Availability of Options Transportation Costs Statistical Variation

Mobility Indices

Availability of modes to reach each destination in the market basket

30 minutes 60 minutes 45 minutes 45 minutes

Travel TimeThreshold

Mode Choice Index

Mode Choice Index

0 100

Relative cost to reach destinations in the market basket

$0.56 / mile+

Parking Cost

$2.75 / trip $0.15 / mile $0 / mile

Affordability Index

$14.10 / hr

Affordability Index

• $$$$ • $0 100

0 5 10 15 20 25 30 35 40

Consistency in travel duration at a given time

Reliability Index

Percent under85th percentile

85th Percentile

Travel Time

Minutes

Total trips in one month

0 100

Reliability Index

Seattle Mobility Scores

Average

72Average48

Average

24

0 100

Case study: University District

Average

78City Average

72

0 100

Average

57City Average

48Average

47City Average

24

Using indices to make predictions

PSRC Travel Survey

Can we predict drive-alone behavior?

Mode choice & affordability 77% Accuracy

80% Accuracy

Predictors

Different people, different needs

5 Travel PersonasUnderstand people with different mobility patterns

K-Means clustering

PSRC household travel survey data

Identified 5 different personas

GOAL

METHOD

DATA

A B

C

D E

RESULT

70%

8% 6%16%10%

33%

11%

46%

Driving Transit Biking Walking

Going to workHousehold Income Over $75,000

28%

67%38%

24%

Persona A

Persona B

56

7166

62

76

Mode Choice Index

A B C D E

City Average: 72

City Average: 48

Affordability Index

Persona-Tuned Indices 49 49

48

44

48

A B C D E

Case study: University District

Mode choice comparisonBaseline

AffordabilityAverage

78Average

64Persona B

Affordability comparison

Mode choice AffordabilityBaseline

Average

57Average

48Persona B

Contributions

Status Quo Frontier

Isolated measurement Granular and comprehensive measurement

Expensive Low cost, scalable, and reproducible

Difficult cross-domain collaboration

Data designed for collaboration and correlation

35 40 45 50 55 60 65 70 75 80 85 90 95 100

$30K

$40K

$50K

$60K

$70K

$80K

$90K

$100K

$110K

WESTSEATTLE

SEWARDPARK

RAINIERVALLEY

MAGNOLIA

INTERBAY

CENTRALAREA

CASCADE

CAPITOLHILL

UNIVERSITYDISTRICT

QUEENANNE

NORTHGATE

LAKECITY

DOWNTOWN

DELRIDGE

BEACONHILL

BALLARD

HouseholdIncome

Affordability Index

Next Steps

Add new modesGet full data setfor reliability index Baseline

Who is this for and how can it be used?

Community organizations &

Nonprofits

Other cities

Transportation researchers&

policy analysts

City of Seattle

Seattle Mobility Index Project Final Presentation...

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