measuring the value of connectivity
TRANSCRIPT
Case Studies: Measuring the Value of Connectivity
NCAPA
September 2010
GREATEST HITS
Re-defining Connectivity: Circa 2010
• Change in emphasis at the Federal level
• New initiatives in North Carolina• How do we get to true integration
of transportation & land use?• Pedestrian & bicycle planning in
the context of Active Living• Implications for safety & access
Driving & the Built Environment – the 5 D’s
Density Population & employment by geographic unit (e.g., per square mile, per developed acre).
Diversity Mix of land uses, typically residential and commercial development, and the degree to which they are balanced in an area (e.g., jobs–housing balance).
Design Neighborhood layout and street characteristics, particularly connectivity, presence of sidewalks, and other design features (e.g., shade, scenery, presence of attractive homes and stores) that enhance the pedestrian- and bicycle-friendliness of an area.
Destination accessibility Ease or convenience of trip destinations from point of origin, often measured at the
zonal level in terms of distance from the central business district or other major centers.
Distance to transit Ease of access to transit from home/work (e.g., bus/rail stop within ¼ to ½ mile).
Ewing & Cervero, JAPA, Summer 2010 | TRB Report #298
DOT – HUD – EPA Partnership for Sustainable Communities
• Livability PrinciplesImprove access to affordable
housingMore transportation optionsLower transportation costs
while protecting environment• Partnership Agreement
Develop livability measures and tools
Undertake joint research & data collection
Connectivity & Active Living
• International Journal of Health Geographics– Berrigan, Pickle, Dill
• Los Angeles and San Diego Counties• Applied 9 measures of street
connectivity• Identified positive correlation
between connected street system and the propensity and duration of leisure walking and cycling
Draft FTA Policy – Connectivity Nexus
“
FTA encourages the use of its funds for the type of well-designed pedestrian and bicycle amenities that attract new public transportation riders by expanding the catchment area and utility of public transportation stations.
(Proposed FTA Policy Statement on the Eligibility of Pedestrian and Bicycle Improvements Under Federal Transit Law. November 6, 2009)
“
Draft FTA Policy – Connectivity Nexus
Key requirement for determining the eligibility of a pedestrian or bicycle improvement is whether it has a functional relationship to a public transportation facility.
Pedestrian Improvements – within one-half mile
Bicycle Improvements – within three miles
Connectivity & Safe Streets
Source: Wesley Marshall and Norman Garrick | New Urban News and CNU
CharacteristicSafer Cities
Less Safe Cities
Percent Difference
Average year of incorporation 1895 1932
Average year of block development 1957 1972
Population (2000 Census) 65,719 58,845 -8.9
Real intersection density (per sq mi) 106.2 62.7 -41.0
Average block size (acres) 18.2 34.5 89.6
Link to node ratio 1.34 1.29 -3.7
Fatal crashes 3.1 10.1 225.8
Fatal crashes not on limited access highways 2.3 8.6 273.9
Source: Wesley E. Marshall and Norman Glick, Street Network Types and Road Safety: A Study of 24 California Cities
safer less safe
• Better connected cities are safer
• Intersection Density (better measure) & Link-Node Ratio
• Both measures – difficult for people to understand intuitively
NC Sustainable Communities Task Force
NC House Bill 1701
• Regional sustainability partnerships• Technical assistance to state agencies,
local government, regional collaborations, and nonprofits
• Indentify & pursue sustainable development funding
• Recommendations for sustainable development policies and program appropriations to Governor, cabinet, & General Assembly
NC Sustainable Communities Task Force
NC House Bill 1701
• Distribute task force grants to regional sustainable development partnerships
• Develop a common local government sustainable practices scoring system
• Pursue opportunities for coordination among state agencies
• Reduced overlap in the responsibilities of regional entities
Case Studies: Measuring the Value of Connectivity
NCAPA
September 2010