Thread: The science of bike lane advocacy.
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Old 05-16-07, 07:27 AM
  #162  
John C. Ratliff
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Originally Posted by Helmet Head
John R,

The study says: "All of the sites had a high level of cyclist and motorist interaction, as well as a history of complaints."

That's what I mean by the bike lanes were dangerous.
So they painted them blue, and the bike lanes became less dangerous. How is that evidence supporting advocacy for bike lanes?
Helmet Head,

You cannot even acknowledge what a study's abstract says, when it's right in front of you. If you only recognize your own spin on everything, then trying to put studies in front of you is a useless activity.

John

PS--Here it is again:

Title: EVALUATION OF BLUE BIKE-LANE TREATMENT IN PORTLAND, OREGON
Accession Number: 00798925
Record Type: Component
Language 1: English
Record URL: http://dx.doi.org/10.3141/1705-16
Abstract: Many European cities use colored markings at bicycle-motor vehicle crossings to reduce conflicts. To determine whether such colored markings help improve safety at American bicycle-motor vehicle crossings, the city of Portland, Oregon, studied the use of blue pavement markings and a novel signage system to delineate selected conflict areas. The University of North Carolina Highway Safety Research Center (HSRC), under contract to the Federal Highway Administration, analyzed the project data. From 1997 to 1999, Portland marked 10 conflict areas with paint, blue thermoplastic, and an accompanying "Yield to Cyclist" sign. All of the sites had a high level of cyclist and motorist interaction, as well as a history of complaints. The crossings were all at locations where the cyclist travels straight and the motorist crosses the bicycle lane in order to exit a roadway (such as an off-ramp situation), enter a right-turn lane, or merge onto a street from a ramp. The study used videotape analysis and found most behavior changes to be positive. Significantly higher numbers of motorists yielded to cyclists and slowed or stopped before entering the blue pavement areas, and more cyclists followed the colored bike-lane path. However, the blue pavement also resulted in fewer cyclists turning their heads to scan for traffic or using hand signals, perhaps signifying an increased comfort level. The overwhelming majority of cyclists and close to a majority of motorists surveyed felt the blue areas enhanced safety. Colored pavement and signage should continue to be used and evaluated in bicycle-motor vehicle conflict areas. (Emphasis added, jcr)
Supplemental Notes: This paper appears in Transportation Research Record No. 1705, Pedestrian and Bicycle Transportation Research 2000.
TRIS Files: HRIS
Pagination: p. 107-115
Authors: Hunter, W W; Harkey, D L; Stewart, J R; Birk, M L
Features: Figures (8); Photos (3); References (5); Tables (3)

Monograph Info: See related components
Corporate Authors: Transportation Research Board
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http://pubsindex.trb.org/document/vi...sp?lbid=667814
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