school bike route analysis city of seattle michael houston cee 424 final project
TRANSCRIPT
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School Bike Route AnalysisCity of Seattle
Michael HoustonCEE 424Final Project
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Biking in Seattle
•More Seattle residents are biking every year▫Desire for safe, direct routes▫Choose routes that avoid major hills
•Safe Routes to School Program is growing▫Federally funded program▫More schools are asking for projects
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Analysis Problem
•Scenario: Older sister at Nathan HaleHigh School wants to pick up younger brother at Laurelhurst Elementary with her new bike
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City of Seattle GIS Data
•Street Network▫Arterials and neighborhood streets
•Bike System▫Off-street facilities▫On-street routes
•Elevation▫2-foot contours from the City of Seattle
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Bike Network
•Multiuse paths▫Separate from roads
•Bike lanes▫Painted lanes on
roadway•Urban connectors
▫Signed bike routes•Residential
connectors▫Other streets
preferred by bikers
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Elevation
•2-foot contour shapefile•Created 3-D TIN
Union Bay
UW
Sand Point
LakeWashingtonLake City
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Elevation and Roadway Network
•Assigned weights to preferred bike routes▫Multiuse paths have
the highest rating▫Other streets have
lowest rating•Grade determined
from elevation profile▫Higher grades have
lower ratings
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Three Analyses
•Shortest distance▫Street network to determine distance
•Best bike facilities▫Best bike facilities and lowest grade
between start and end•Bike facilities and distance
▫Combines best bike facilities with distance
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Results
•Shortest distance uses arterial routes
•Best bike facilities uses Burke-Gilman Trail
•Combination uses a more direct, but compromised route
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Conclusions
•Shortest route for bikes usually includes arterial streets without bike facilities that may be unsafe
•Routes with the best bike facilities often include significant out-of-direction travel to use high quality multiuse pathways
•Routes that include bike facilities and distance use some routes with bike lanes and other streets▫Not the flattest or safest route, but limits
total distance bikers travel