Geospatial Analysis for SB375 Planning
Three main areas:
1.
Optimize new housing mix to reduce vehicle miles
traveled (VMT)
2.
Identify (and if possible rank*) suitable sites for transitoriented development (TOD)
3.
Identify (and if possible rank*) potential mass transit
capital projects and/or service modifications
* Possible ranking meant to demonstrate a range of potential scenarios based
on different value streams
All three are best performed in GIS
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Cal Poly Pomona
Center for Geographic Information Science Research
Criteria for New Housing
•
Determine optimal unit type mix (SFR vs. multi, TOD vs.
non-TOD multi, tenure mix, affordability) given new
housing allocations, CEQA breaks and local needs
•
Select sites for optimal mix if available or else adjust mix
to that which is optimal given the geography of available
sites
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Cal Poly Pomona
Center for Geographic Information Science Research
Criteria for TOD Analysis
• Geography of existing mass transit
• Potential geographies of new mass transit under various
scenarios
• Specifications for suitable parcels, and availability
(subject to zoning variances if necessary)
• Demand for multifamily housing
• Economic feasibility of potential TOD developments
(including benefits of CEQA breaks)
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Cal Poly Pomona
Center for Geographic Information Science Research
Criteria for Transit
Planning Under SB375
• Similar to ordinary criteria for optimal service, except
• Consider service increases and/or modifications that
would be optimal under various scenarios of new TODs
and various increased transit funding scenarios
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Cal Poly Pomona
Center for Geographic Information Science Research
TODs are Key
Note that each of the three analyses are driven
by TOD decisions:
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How many TOD units to develop?
What size TOD developments?
What use mixes (housing, retail, office…)
What specific parcels to target?
Once these decisions are made, the parameters
for the other decisions shift accordingly
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Cal Poly Pomona
Center for Geographic Information Science Research
Housing
Allocation
Existing
Transit
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TOD Plan
New
Transit
Plan
Housing
Mix
New Housing
Site Selection
Plan
Cal Poly Pomona
Center for Geographic Information Science Research
Data Requirements
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Geospatial Data:
Existing housing
Existing transit
Parcel data w/ availability
Zoning entitlements
Geodemography of home &
work
commutes
• Geography of services
(shopping etc.)
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Other Data:
• Housing allocation
• VMT reduction targets
• Housing mix preferences
• Strategic decisions re:
TOD and transit network
development
Cal Poly Pomona
Center for Geographic Information Science Research
Scale of Analysis
• MPOs are charged with developing SB375 compliance
plans called sustainable communities strategies (STS),
but
• MPOs are answerable to their constituent local
governments
• Local governments should consider doing their own
SB375 planning so as to better lobby their MPOs for the
plans they like best
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Cal Poly Pomona
Center for Geographic Information Science Research
Planned Methods and Tools for
Strategic SB375 Planning
• The SB375 team at Cal Poly Pomona is
proposing to develop methods and tools with
support from the LTC during 2009-2010
• Methods = An analytic protocol specifying
models, threshold ranges and processes for the
analysis tasks
• Information = A Clearinghouse offering relevant
data in standardized formats and other useful
utilities
• Tools = A largely automated set of GIS routines
to implement the protocol and help local
governments with SB375 planning
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Cal Poly Pomona
Center for Geographic Information Science Research