sidewalk bikeways: a safety problem, not a safety solution
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Sidewalk Bikeways: A Safety Problem, Not a Safety Solution. Basic Principles. Operating any vehicle in traffic (whether on a roadway or a path) requires: Skills Knowledge Judgment. Basic Principles. Knowledge Rules of the Road Defensive Driving Techniques Judgment - PowerPoint PPT PresentationTRANSCRIPT
Sidewalk Bikeways:A Safety Problem,
Not a Safety Solution
Basic Principles
Operating any vehicle in traffic (whether on a roadway or a path) requires:
• Skills• Knowledge• Judgment
Basic Principles
Knowledge• Rules of the Road• Defensive Driving Techniques
Judgment• Applying Knowledge and
Skills to Existing Conditions
Skills for Cycling on Neighborhood Streets• Starting• Steering/Balance• Braking• Scanning Ahead• Judging Speed of Other Vehicles• Scanning Behind Without
Swerving• Driving One-Handed to Signal
Skills for Collector & Arterial Streets• Starting• Steering/Balance• Braking• Scanning Ahead• Judging Speed of Other Vehicles• Scanning Behind Without
Swerving• Driving One-Handed to Signal
Skills for Cycling on Sidepaths• Starting• Steering/Balance• Braking• Scanning Ahead• Judging Speed of Other Vehicles• Scanning Behind Without Swerving• Simultaneously scanning ahead
and behind• Driving One-Handed to Signal
Which is Safer -- the Street or the Sidewalk?
Streets WithBike Lanes
DesignatedBike Routes
Multi-UseTrails
Minor Streets Major Streets Sidewalks
0.5 0.5
5.32
1.261.040.67
Relative Risk of Bicycle Facility Types Source: National Bicycle Commuter Survey, William Moritz, University of Washington, Seattle, Human Powered Transportation
Program
Higher Number Indicates Higher Risk of Bicyclist Crash with a Motorist
Problems with Sidewalk Bikeways
• Treat bicyclists as pedestrians – however, bicyclists are less maneuverable than pedestrians and therefore less able to deal with the conflicts experienced by pedestrians
Problems with Sidewalk Bikeways
• Require users to scan both ahead and behind at intersections
• Motorists more likely to block sidepaths than bike lanes or wide curb lanes
Problems with Sidewalk Bikeways
• Motorists must scan wider areas than they normally would
• Cyclists who choose to stay on the roadway will be harassed
The Skills Myth: “On-Road Cycling Requires More Skill than Sidepath
Cycling”• The scanning skills
necessary for cycling on a sidepath are MORE COMPLEX than for cycling on the roadway
The Skills Myth: “On-Road Cycling Requires More Skill than Sidepath
Cycling”• The motorist’s side of the
equation – sidepaths require motorists to scan for cyclists MORE THOROUGHLY than on-road facilities
• This often occurs at the same time and place where cyclists are required to conduct more complex scans
The Skills Myth: “On-Road Cycling Requires More Skill than Sidepath
Cycling”• For some conflicts, bicyclists
on sidepaths must have BETTER braking or steering skills than if they were on the roadway
Conflicts on Unidirectional
Sidepaths Compared to Conflicts on
Roadways
Left Turns
Unidirectional Paths Are Not Unidirectional
• On multi-lane highways, cyclists with a destination a short distance away on the same side of the street will often avoid crossing the street by driving facing traffic
Unidirectional Paths Are Not Unidirectional
• A standard five-foot unidirectional path will not safely accommodate two cyclists approaching head-on
• Who will enforce it?
Right Turns
Right Turns
Cyclist Failureto Yield Motorist
Failure to Yield Cyclist FacingTraffic Motorist
Overtaking
42
1517
12
5
Fatalities
Incapacitating Injuries
What are the Causes of the Most Serious Injuries? (Daytime)
What are the Causes of the Most Serious Injuries? (Nighttime)
CyclistFailure to
YieldMotoristFailure to
YieldCyclistFacingTraffic
MotoristOvertaking
21
7 427
3
7
Fatalities
Incapacitating Injuries
A Choice:Greater Increase in
Perceived Safety but with a Decrease in Real Safety
(sidepath)or a
Lesser Increase in Perceived Safety with an
Increase in Real Safety
(bike lane or wide curb lane)