1 there are many ways to put a road on a diet jack witthaus sunnyvale transportation & traffic...
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There Are Many Ways to There Are Many Ways to Put A Road on a DietPut A Road on a Diet
Jack WitthausJack WitthausSunnyvale Transportation & Traffic ManagerSunnyvale Transportation & Traffic Manager
[email protected]@ci.sunnyvale.ca.us
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Road Diets in SunnyvaleRoad Diets in Sunnyvale
Seven + Roads “Dieted”Seven + Roads “Dieted”
Primarily 4 lane to 2 lane + TWLTLPrimarily 4 lane to 2 lane + TWLTL
ImpetusImpetus
–Community ConcernsCommunity Concerns
–Bikeway Network ExpansionBikeway Network Expansion
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How Did Roads Get Dieted?How Did Roads Get Dieted?
Location-Specific Location-Specific Concerns/Studies/Projects Concerns/Studies/Projects
Quick Decision, Opportunistic Quick Decision, Opportunistic ProjectsProjects
Planned, Studied, Designed ProjectsPlanned, Studied, Designed Projects
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Location Specific, “First Generation” Location Specific, “First Generation” DietsDiets
Pre-Livable Community, Bike Network Pre-Livable Community, Bike Network MovementsMovements
Driven by Community ConcernsDriven by Community Concerns
– Safety Concerns (Not Safety Issues)Safety Concerns (Not Safety Issues)
– Pedestrian SafetyPedestrian Safety
– Bike SafetyBike Safety
– Speed, Volume of VehiclesSpeed, Volume of Vehicles
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ProcessProcess
Location-Specific StudiesLocation-Specific Studies
Outreach to Effected Outreach to Effected NeighborhoodsNeighborhoods
Citizen-Driven DesignsCitizen-Driven Designs–Refuge Islands – Old San Refuge Islands – Old San
Francisco RoadFrancisco Road–No Bike LanesNo Bike Lanes
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ResultsResults
No Traffic Impact Other than Island No Traffic Impact Other than Island CrashesCrashes
Mixed Community ResponseMixed Community Response–Bicyclists HatedBicyclists Hated–Islands Get Hit, Some People Islands Get Hit, Some People
Don’t Like ThemDon’t Like Them–Pavement DeteriorationPavement Deterioration
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““Second Generation” Diets for Second Generation” Diets for Bikeway ExpansionBikeway Expansion
Bicycle Opportunities Study – 1998Bicycle Opportunities Study – 1998– Citywide Bike Lane Study of Arterials Citywide Bike Lane Study of Arterials
and Collectorsand Collectors– Methods StudiedMethods Studied
Geometric ChangesGeometric ChangesParking Modification/RemovalParking Modification/RemovalRoad WideningRoad WideningTravel Lane RemovalTravel Lane Removal
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The Bike Opps Road DietThe Bike Opps Road Diet “Golden Ratio” “Golden Ratio”
Uncongested Travel Lane Capacity=Uncongested Travel Lane Capacity=
360 Vehicles per Hour360 Vehicles per Hour– Free Flow Capacity 1800 VPHFree Flow Capacity 1800 VPH– Reduced to 1200 VPH to Account for Traffic Reduced to 1200 VPH to Account for Traffic
Fluctuation, Future GrowthFluctuation, Future Growth– Reduced to 360 VPH Assuming 30% Green Reduced to 360 VPH Assuming 30% Green
Time in Non-Free Flow ConditionsTime in Non-Free Flow Conditions
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Practical Results of Bike OppsPractical Results of Bike Opps
Underlying Justification, Basis for Underlying Justification, Basis for Operations and Capital Operations and Capital Improvement Decisions Improvement Decisions
Proactive, CatalystProactive, Catalyst
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What Was Catalyzed?What Was Catalyzed?
Modification of Roadway Modification of Roadway Geometry Following Pavement Geometry Following Pavement ProjectsProjects
Grant ApplicationsGrant Applications
Capital Project ProgrammingCapital Project Programming
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Operations “Projects”Operations “Projects”
Geometric Changes Following Geometric Changes Following Pavement RehabilitationPavement RehabilitationLittle/No Technical Confirmation Little/No Technical Confirmation of Opps Studyof Opps StudyNo Public InputNo Public InputOpportunisticOpportunistic
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Results of Operations ProjectsResults of Operations Projects
Successful OperationallySuccessful Operationally
Hurried “Designs”Hurried “Designs”– Less than Optimal GeometryLess than Optimal Geometry– Less than Optimal Traffic Signal Equipment Less than Optimal Traffic Signal Equipment
PlacementPlacement
Some Public BacklashSome Public Backlash
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Planned, Scheduled, Designed Planned, Scheduled, Designed Capital ProjectsCapital Projects
Attractive Grant OpportunitiesAttractive Grant Opportunities
Follow-on Study of Intersection, Follow-on Study of Intersection, Operational ImpactsOperational Impacts
Public OutreachPublic Outreach
Well Developed DesignsWell Developed Designs
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ResultsResults
Next to No Public OutcryNext to No Public Outcry
ExpensiveExpensive
Operationally SuccessfulOperationally Successful
Defensible ProjectsDefensible Projects
Public Interest in Road Diets is GrowingPublic Interest in Road Diets is Growing
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ConclusionsConclusions
““Fat” Roads ExistFat” Roads ExistRoad Diets Can Be Successful Road Diets Can Be Successful – OperationallyOperationally– Public AcceptancePublic Acceptance
Diligence in Project Planning and Design Diligence in Project Planning and Design HelpsHelps– Do Comprehensive Area-Wide PlanningDo Comprehensive Area-Wide Planning– Do Comprehensive Capital Project Do Comprehensive Capital Project
Engineering and OutreachEngineering and Outreach