01333243

Component

https://doi.org/10.3141/2247-09

http://scholar.google.com...rman&publication_year=2011

Shared lane markings (sharrows) convey the message that motorists and cyclists must share the travel way on which they are operating. The purpose of the markings is to create improved conditions for bicycling by clarifying where cyclists are expected to ride and reminding motorists to expect cyclists on the road. A before–after evaluation was conducted to compare how cyclists and motorists operated on a street with parallel parking in Cambridge, Massachusetts, with no markings versus with sharrows placed 10 ft (3.05 m) from the curb. This evaluation, which was part of a broader FHWA study on sharrows, was intended to help determine whether an alternative to the 11-ft (3.4-m) spacing recommended in the 2009 version of the Manual on Uniform Traffic Control Devices would be effective. Operational and safety measures for bicyclists and motorists were examined. Overall, safety effects appeared to be associated with the installation of the sharrows placed 10 ft (3.05 m) from the curb. Perhaps the most important effect was the 14-in. (36-cm) increase in spacing between motor vehicles in the travel lane and parked motor vehicles when no bicycles were present. This effect increased the operating space for bicyclists. Many variables related to the interaction of bicycles and motor vehicles also showed positive operational and safety effects.

01361562

11-1467

English

pp 72-80

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167673

Print

Figures (5) ; Maps; Photos; References (8) ; Tables (4)

Before and after studies; Cyclists; Drivers; Highway design; Highway operations; Highway safety; Lane lines; Road markings; Traffic lanes; Traffic safety

Shared-use lanes; Sharrows

Cambridge (Massachusetts)

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I73: Traffic Control; I82: Accidents and Transport Infrastructure

PRP, TRIS, TRB, ATRI

Feb 17 2011 5:49PM

• Are Cycle Centers Effective Transport Interventions? Evaluating King George Square Cycle Center in Brisbane, Australia
• Bicycle Parking Analysis with Time Series Photography
• Bikeability and the 20-min Neighborhood: How Infrastructure and Destinations Influence Bicycle Accessibility
• China’s Hangzhou Public Bicycle: Understanding Early Adoption and Behavioral Response to Bikesharing
• Estimating Potential Effect of Speed Limits, Built Environment, and Other Factors on Severity of Pedestrian and Cyclist Injuries in Crashes
• How Do Level of Experience, Purpose for Riding, and Preference for Facilities Affect Location of Riding? Study of Adult Bicycle Riders in Queensland, Australia
• Impact of Bicycle Lane Characteristics on Exposure of Bicyclists to Traffic-Related Particulate Matter
• Intersection Crossing Times of Bicyclists: Quantitative Measurements at Diverse Intersections
• Much-Anticipated Marriage of Cycling and Transit: How Will It Work?
• Pilot Models for Estimating Bicycle Intersection Volumes
• Travel Time Competitiveness of Cycling in Sydney, Australia
• Uniform Vehicle Code and State Statutes Governing Bicycling, 2010: Analysis of Definitions and Statutes
• Weather or Not to Cycle: Temporal Trends and Impact of Weather on Cycling in an Urban Environment