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Divya Nagananda
and
Dr. Emelinda M. Parentela
California State University, Long Beach
June 26, 2012
Santa Barbara ITE 2012
An Evaluation of Bike Lanes
Overview
Santa Barbara ITE 2012
IntroductionStudy AreaData CollectionAnalysis (Accident and Statistical)Online SurveyConclusions
Introduction
Santa Barbara ITE 2012
• City of Long Beach• Bicycle Master Plan• Bicycle Classes– Class I– Class II– Class III
Bicycle Classes
Santa Barbara ITE 2012Class I Bicycle Lane Class II Bicycle Lane Class III Bicycle Lane
Source: Alta Planning + Design, 2009
Study Area
Santa Barbara ITE 2012
Class I - 3rd Street between Daisy Avenue and Atlantic Avenue
Study Area
Santa Barbara ITE 2012
Class II – 2nd Street between Livingston Drive and Pacific Coast Highway
Study Area
Santa Barbara ITE 2012
Class III - Pacific Coast Highway between Los Coyotes Diagonal and Orange Avenue
Data Collection
Santa Barbara ITE 2012
Accident Data
Bicycle Accident Location – 3rd Street
Santa Barbara ITE 2012
Bicycle Accident Location – 2nd Street
Santa Barbara ITE 2012
Bicycle Accident Location – Pacific Coast Highway
Santa Barbara ITE 2012
Accident Analysis – Primary Cause
Santa Barbara ITE 2012
Accident Analysis – Primary Cause
Santa Barbara ITE 2012
Accident Analysis – Primary Cause
Santa Barbara ITE 2012
Accident Analysis
Santa Barbara ITE 2012
Day versus Night
Statistical Analysis
Santa Barbara ITE 2012
Student T-testNo significant differences by year in the
number of accidents on all locations EXCEPT SIGNIFICANT - 2nd Street – 2009
Might have caused confusion among motorists and bicyclists
2010 - reduction in the number of accidentsGreen lane with sharrows is helpful in improving the
safety of bikers and motorists Insufficient data to draw definite conclusion
Online Survey
Santa Barbara ITE 2012
Online survey via Kwiksurveys.comFocused on issues related bicycling trend
and safetyReached through various bicycle coalitionsGot about 90 responses
Online Survey Responses – Quick Look
Santa Barbara ITE 2012
88% respondents rode bicycles
Online Survey Responses – Quick Look
Santa Barbara ITE 2012
Online Survey Responses – Quick Look
Santa Barbara ITE 2012
Bicycling Frequency37% - 5 to 7 days in a week29% - 1 to 4 days in a week34% - Couple of days in a month
Bicyclist in a Collision21% - Motor Vehicles5% - Other Bicyclists5% - Pedestrians
15% - No bike lanes5% - Sidewalk; 3% - Crosswalk
Online Survey Responses – Quick Look
Santa Barbara ITE 2012
Most Common Problems32% - Not sharing the roadway32% - Inadequate bicycle lanes/facilities13% - Vehicles parked on the bicycle lanes11% - Another bicyclist on the wrong side6% - motorists opening door without
checkingBicycle Class prone to accidents
40% - Class III35% - Class II5% - Green lanes with sharrows; 5% - Class I15% - No Answer
Online Survey Responses – Quick Look
Santa Barbara ITE 2012
Overall Improvements to Enhance Safety36% - More bicycle lanes29% - Drivers should be more considerate
19% - Traffic calming measures6% - Better traffic signals2% - Better street lighting8% - No answer
Conclusions
Santa Barbara ITE 2012
Research in ProgressData Still in the Process of AnalysisPer Initial Analysis
Class III – highest number of accidentsFelt to be the least safe
Primary Cause varies with ClassClass III – due to motorists, pedestrians & wrong
side of the roadClass II – mostly due to motorists
Acknowledgements
Santa Barbara ITE 2012
Staff, City of Long Beach Mr. David Roseman, Mr. Alan Crawford, and Mr. Steve Tweed
Online Survey Respondents
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