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Local Access at TRB 2017

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Local Access is a tool to help Massachusetts communities prioritize sidewalk and bike route improvements on the most useful connections between residents and important local destinations.

This presentation was delivered at the Transportation Research Board 2017 Annual Meeting, Session 616: Use of Statewide Systems and Data for Project Planning, Selection, and Prioritization.

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Local Access at TRB 2017

  1. 1. Local Access Scores Tim Reardon Director of Data Services Metropolitan Area Planning Council A New Measure of Network Utility for Complete Streets Planning and Implementation Transportation Research Board 2017 Session 616 Use of Statewide Systems and Data for Project Planning, Selection, and Prioritization January 10, 2017
  2. 2. Massachusetts Complete Streets Funding Program How can we prioritize efforts? How can we measure success? $100 million authorized by legislature over five years; $12.5M in FY16 & FY17
  3. 3. What inputs do local governments use when determining where to build sidewalks and bike facilities? 77% of Massachusetts roadways lack sidewalks: 35,000 miles of incomplete streets
  4. 4. Constituent Requests Ad hoc School Administrators Local Committee
  5. 5. Prioritization plans need prioritization criteria Speed Crashes Feasibility & Cost Demographics ADA compliance Field Surveys What about utility?
  6. 6. Is Proximity Paramount?
  7. 7. Which streets and roads are likely to have the greatest utility for pedestrians and cyclists traveling to local destinations, if safe and complete streets were available?
  8. 8. Introducing… Active Transportation Network Utility
  9. 9. Trip Production & Distribution Trip Purpose Trip Generation rates based on… Trip Attraction rates based on… Shopping, Services, Restaurants Household size (Census 2010) Restaurant & Retail Employees (InfoGroup) School Population age 5 to 17 (Census 2010) School Enrollment (MA DESE) Transit Household size (Census 2010) Transit Frequency (EPA Smart Location Database) Outdoor Recreation Household Size (Census 2010) Acres of Open Space (MassGIS) • All production & attraction takes place at census block level • Production and attraction rates based on analysis of 2011 Massachusetts Household Travel Survey (MTS) • Doubly-constrained gravity models with input impedance based on distance skim of network, calibrated to MTS data • School commute trips cannot cross district boundaries
  10. 10. Mode Choice 0% 10% 20% 30% 40% 50% 60% 70% 80% PercentofTrips Trip Length (Miles) Active Transportation Mode Share: Home-Based Retail & Restaurant Trips Bike Walk Source: Massachusetts Travel Survey, 2011; MAPC Analysis • Multinomial logit model for each trip purpose: walk, bike, other • Input variables include distance, WalkScore™ at origin & destination • Main effect is to divert long trips away from walking & biking
  11. 11. Assignment & Composite Scores • Network includes all surface streets and mapped off-road facilities, excludes limited access highways • Trips assigned to minimize distance; no built environment or P/BLOS impedance measures used • Eight trip purpose/mode scores produced: • Walk to shopping/restaurants • Bike to shopping/restaurants • Walk to school • Bike to school • Walk to outdoor recreation • Bike to outdoor recreation • Walk to transit • Bike to transit • Raw trip estimates rescaled to a value of 1 – 100, weighted, and combined to create composite scores: • Composite walk utility score • Composite bike utility score • Overall utility score • Results produced for 154,000 census blocks containing 2.5 million households, with scores available for 49,000 local roadway miles across Masschusetts
  12. 12. Local Access Score: Walk to Shops and Restaurants
  13. 13. Local Access Score: Bike to Shops and Restaurants
  14. 14. Local Access Score: Composite
  15. 15. Local Access Score: Applications Pedestrian Prioritization Plans • MAPC-produced plans based on Local Access secured $1.2 million capital funds in first round of state grants Capital Investments Wayfinding Pedestrian and Bicycle Counts Maintenance and Enforcement ADA Assessments
  16. 16. Local Access Score: Crash Overlay
  17. 17. High-Utility road segment connects residential areas, schools, & downtown, but lacks sidewalks Local Access Score: Sidewalk Gap Analysis Desire Lines: the best indicator of sidewalk need
  18. 18. localaccess.mapc.org Interactive map Data download User Guide Technical Documentation
  19. 19. Average > 100 users per week Visits from 127 cities and towns across MA >60 dataset downloads Since launching localaccess.mapc.org:
  20. 20. Connectivity errors in the source data Informal or unmapped walking routes missing Travel around/within blocks nor represented School trips assume proximity-based assignment Transit trips hard to estimate Not all trip types represented Pedestrian Infrastructure Isn’t Perfect and Neither are We…
  21. 21. Tim Reardon, Director of Data Services Metropolitan Area Planning Council treardon@mapc.org data.mapc.org localaccess.mapc.org With funding support from: In collaboration with: Massachusetts Community Innovation Challenge Grant Program