overview of the 2012 aashto bike guide to the aasht… · brian parsons february 19, 2013 overview...
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Brian Parsons
February 19, 2013
Overview of the 2012 AASHTO Bike
Guide
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•2009 MUTCD – FHWA •Public Right-of-Way Accessibility Guidelines (PROWAG) •2010 Highway Capacity Manual
Relationship to other manuals
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• NCHRP - National Academy of Sciences
• Scoping Study: 2004-2006
• Preparation of the content of the 4th Edition: 2007-2009
• Final edits/State DOT balloting process: 2010-2012
How the Guide was developed
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• Guide expanded from 75 pages to over 200 pages
• 3 chapters to 7 chapters
• Sold 1200 copies in the first month
Release of the guide – June 2012
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Chapters
• Chapter 1: Introduction
• Chapter 2: Bicycle Planning
• Chapter 3: Bicycle Operation and Safety
• Chapter 4: Design of On-Road Facilities
• Chapter 5: Design of Shared Use Paths
• Chapter 6: Bicycle Parking Facilities
• Chapter 7: Maintenance and Operations
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Chapters
• Chapter 1: Introduction
• Chapter 2: Bicycle Planning
• Chapter 3: Bicycle Operation and Safety
• Chapter 4: Design of On-Road Facilities
• Chapter 5: Design of Shared Use Paths
• Chapter 6: Bicycle Parking Facilities
• Chapter 7: Maintenance and Operations
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• Guidance on how to choose bikeway type
• Affirms lane diets and road diets
• Expanded bike lane guidance
Major changes in 2012 Guide
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• Expanded signal guidance
• Expanded shared use path guidance (including paths adjacent to roads)
Major changes in 2012 Guide
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• No differentiation of what type of bikeway was appropriate given roadway characteristics
Choosing bikeway type – 1999 Guide
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• Detailed guidance on facility selection
• Support for bike lanes and shared use paths where volumes and speeds are higher
• Warnings against using wide outside lane as a standard treatment for high volume roads
Choosing bikeway type – 2012 Guide
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•Permission to narrow lane widths to create bike lanes
•10’ and 11’ wide travel lanes are acceptable
Roadway retrofit
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• Provides guidelines for road diets
Road diets
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• Nuanced guidance on widths (4 to 7 feet)
• Measures to reduce crashes with car doors
• Bike lanes adjacent to back-in angle parking
• Bike lanes at roundabouts
• Buffered bike lanes
• Green bike lanes, etc.
Bike lanes
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Old Guide – weak
New Guide – strong
Detailed guidance on all aspects of signal design
Signal design
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Shared use paths
• Extensive intersection design guidance
Major change: paths next to roads are not forbidden, provides guidance on how to design them
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• AASHTO covers design comprehensively
• AASHTO covers paths + on-road bikeways
• AASHTO covers many – but not all innovations
• NACTO is a source of information for solutions that are currently being tested
AASHTO vs. NACTO Guides: either/or?
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• Bike lanes
• Cycle track design
– One-way protected cycle tracks
– Raised cycle tracks
– Two-way cycle tracks
What is in the NACTO Guide?
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• Bike boxes and other intersection designs (including non-standard)
• Colored pavement material guidance
• Bicycle boulevards
What is in the NACTO Guide?
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NACTO Illustrations of bikeway types
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• Planning for bicycles
• Bicyclist operating characteristics
• Geometric design values and details
• Shared use path design
• Bridges
• General road compatibility with bicycles
• Bike parking
• Maintenance
What is NOT in the NACTO Guide?
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• Bike boxes
• Bicycle signal heads
• Does not use the term cycle track
• Warns against putting bike lane between parking lane and curb
Issues NOT addressed by AASHTO Guide
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Example: Two-Way Cycle track 15th Street
Washington, DC
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One way cycle track 9th Avenue
New York City