urban design best practices and innovations · ecological spines - implementation challenges 27...
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Urban Design Best Practices and Innovations
Update
October 8, 2019
JoAnne Fiebe
Department of Planning & Development, Community Revitalization Section
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Streetscape Image Urban Linear Park – eco spine or livability spine
Innovative linear parks that include streets,
streams, and stormwater enhancementsUrban design best practices
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More and more of what our communities desire:
- Socialization and experiences
- Sense of belonging to a place
- Places to walk and interact
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C O M P L E T E S T R E E T S
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Built partnerships with county agencies and created technical
teams (internal and external) to provide expertise
Documented existing conditions in the CRDs/CRAs
- Evaluated quality/maintenance needs of existing infrastructure
- Analyzed property size and shape
Researched national best practices
Incorporating new guidance into updates to the Comprehensive
Plan, Zoning Ordinance, Public Facilities Manual
Now, beginning to apply it countywide to a variety of activity
centers (ex. Merrifield Suburban Center Study/WFC)6
PLAN PFM Z.O.
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S t r e e t s c a p e a n d U r b a n D e s i g n B e s t P r a c t i c e s
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Street trees – Planting Standards and
Tree Species
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Outdated
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Options for how
developers can
provide street trees
when space is limited
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Street trees – Detail developed for the Design
Guidelines based on Alternative Strategy #2
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Green Stormwater Infrastructure
Toolkit
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Green Stormwater Infrastructure
Bio-retention in the landscape panel
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Small-scale and Incremental Development
1. Buildings located close to
the street
2. Parking on sides or rear
3. Planning for future road
network
4. Street trees, streetscape
and site landscaping
5. Public spaces and
pedestrian walkways
6. Monument signs that
aren’t visually obtrusive
PRIMARY ROAD
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Forming a building-to-street relationship to
help realize the vision of the Comp Plan
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Typical Preferred
Small-scale and Incremental Development
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Small-scale and Incremental Development
RICHMOND HWY
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RICHMOND HWY
Original Preferred
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Urban Linear Park – eco spine or livability spine
Livability Spines – linear green spaces
alongside streets, adjacent to development
Ecological Spines – passive parks within existing
riparian corridors, adjacent to development
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I n n o v a t i v e L i n e a r P a r k s
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Wild Mile
Chicago, IL
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Livability Spines – linear green spaces
alongside streets, adjacent to development19
Linear Park along a roadway
Sydney, Australia
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Ecological Spines – Existing Condition in
the Hybla Valley CBC, Richmond Highway
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Ecological Spines are linear parks and enhanced riparian corridors where
there are surface or buried streams. Formed by daylighting covered
streams or by enhancing existing streams and riparian buffer areas,
Ecological Spines serve a range of environmental, recreational, and
educational purposes while connecting people to nature. Some Ecological
Spines also include local streets and stormwater management.
Function as resilient and ecologically
sound riparian corridors
Serve as open space amenities that
enhance community character and
identity
Provide mobility options for
pedestrians, cyclists, and in certain
instances, low-speed vehicles
Foster strong connections between
people and nature by providing
immerse natural experiences
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Ecological Spines – Constrained Scenario
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Ecological Spines – Case Study Example
Headwaters at Tryon Creek, Portland, OR
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Pre-development Condition Site Plan
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Ecological Spines – Unconstrained Scenario
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SHARED USE
PATH
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Ecological Spines – Naturalized Scenario
SHARED USE
PATH
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Ecological Spines – Programming Examples
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Ecological Spines - Implementation Challenges
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– Creation of an ecological spine is one way for developments to address
stormwater guidance in the Comprehensive Plan. It can also help developers
address open space and urban parks framework planning guidance
– Maintenance: responsible party, also ensuring durable and floodable designs
– RPA policy
– Research on case studies, Fairfax policies, and floodable designs, and
strategies to encourage their implementation continues (ie. getting the
barriers out of the way) – we don’t have all the answers yet
– County may need to consider partnerships between developers and the
county (to address financial or technical challenges), particularly in instances
where there are improvements needed to the stream corridor beyond the
project
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Livability Spines are roadways that include linear green spaces and plazas
along their sides and across multiple developments and/or blocks. Livability
Spines enhance multimodal mobility by integrating pedestrian and bicycle
facilities. As linear parks with outdoor activities and active uses adjacent to the
ground floors of buildings, Livability Spines can function as “main streets” and
community gathering places as an alternative to very busy thoroughfares.
Create by aggregating park space
contributions by individual properties
Foster an active street life
Accommodate a spectrum of active
and passive uses
May serve as an alternate ‘Main
Street’ to a busy thoroughfare
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Livability Spines
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Livability Spines
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Livability Spines – Programming Scheme
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More active programming
is located near retail/
commercial, higher-density
uses, and transit
More passive programming
is located near lower
density development and
single-family residential
neighborhoods
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Emerging Issues and On-going Work
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– Managing needs/competing interests for the curb space
– balancing comfort/needs of all users
– minimizing impacts on property owners for additional ROW/land that could
inhibit redevelopment
– Evolving mobility options (scooter, curb management)
– Exploring alternative shared-use path/bike facilities materials (other than asphalt)
that are in keeping with the character of the activity centers
– Keeping up with rapidly changing industry practices for Green Stormwater
Infrastructure design
– Considering impacts of One Fairfax policies in decision-making for streetscapes
and public spaces
– On-going documentation and research work on Ecological Spines
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Urban Design Best Practices and Innovations
October 8, 2019
JoAnne Fiebe
Department of Planning & Development, Community Revitalization Section
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