Potential Sites for Transit-Oriented Development in San Diego Katie Lemmon UP 206 A Final Project March 14, 2011.

Potential Sites for Transit-Oriented Development in San Diego

Katie LemmonUP 206 A

Final ProjectMarch 14, 2011

Policy Question

Where should SANDAG and the City of San Diego work together to prioritize transit-

oriented development and what tools will help these agencies collaborate?

TOD Overview

• Successful transit-oriented development (TOD) needs:– high density of people– access to transit and

amenities– inhabitants who will

actually take transit or non-car modes

Goal

• Identify areas with a high potential for successful TOD within ¼ mile of bus rapid transit and express bus stops and routes (existing and proposed)

• Create tool for inter-agency collaboration and data sharing

Bus rapid transit is one proposed solution to combat region-wide mobility issues in San Diego

Photo credit: Denis Desmond, MTS

Methodology– Identify express bus routes and stops in San Diego– Rank census tracts based on TOD demographics:

• Population density – weighted 1 because it’s an important component of TOD

• Workers who commute using alternatives to cars – weighted 2 because it is more important than density

• Workers with no vehicles – weighted 2 because indicates transit need and is as

– Within identified census tracts, create ¼ buffer around existing express bus stops and proposed rapid route

– Identify redevelopment areas, if any– Identify online tools for collaboration

Ranking based on:• Population density• Alternative mode

commuters • Workers with no

vehiclesSelected Top 5 Highest Ranked Tracts

Ranking based on:• Population density• Alternative mode

commuters • Workers with no

vehicles

4 TOD tracts are within City’s redevelopment area

1 TOD tract is not in redevelopment area and will not be considered for further study

Proposed Rapid Transit

• SANDAG’s proposed Mid-City Rapid line– BRT route– One segment of an

integrated regional network

– Will connect to existing express route along I-15

Proposed Rapid Transit: Original Data

• Metadata for Mid-City Rapid proposed route

• Shapefile created by drawing bus route and stops

• Based on image from www.keepsandiegomoving.com (SANDAG project website)

*Note: ¼ mile buffer around proposed route not just proposed stops because feeder routes stop and connect along proposed route

Combination of two buffers:1. ¼ mile buffer

around proposed route and

2. ¼ mile buffer around existing express bus stops

Google Mash Up: Real World Collaboration Tool

Steps:1. Create model to convert

files to KMZ2. Research for-sale parcels

online as of 3/14/113. Geocode for-sale parcels4. Write html5. Display layers on Google

map6. SANDAG and the City can

share maps

Google Mash-Up: For Sale Properties Near Priority Parcels

http://www.katielemmon.bol.ucla.edu/googlemashup/html

Skills

• Aggregating attribute fields -- combined alternative means to work fields into one field

• Inset map -- locating City of San Diego• Attribute sub-set selection – selected express bus

routes and stops from dataset of all transit modes• Created index – selected and weighted three variables

to create index of high-potential tracts for TOD• Buffering – ¼ mile radius around express bus stops• Geoprocessing – intersect tool to show areas within

census tracts that are ¼ mile from express bus stops

Skills continued

• Modeling – conversion tool to convert multiple layers to KMZ files

• Metadata – created for original data• Original Data – created line shapefile for proposed bus

route, created point shapefile for proposed bus stops• Measurement/Analysis – buffer, intersect, union and dissolve

tools to identify solution to policy question• Google Mash-Up – wrote html file to include proposed route

layer, priority area layer, geocoded for-sale properties• Seven Layers – layout of ¼ mile buffers around existing stops

and proposed route has seven layers

Sources

• SANDAG• SanGIS• UCLA MapShare• ESRI-TIGER• American Community Survey• US Census• Bing maps• Google maps

Thank you!