Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Exploring Traffic Danger        for BicyclistsInitial Findings from a Recent Survey of Drivers           and Bicyclists in ...
Overview•  Survey on perceived and actual bicycle danger•  Findings: Detecting trends   –  Cyclist groups worry about diff...
Methodology & Study Area• Internet survey• Convenience sample• 467 respondents (42% response rate)• Surveyed summer, 2011 ...
Survey PopulationAge Range and Sex Comparison of Survey and Bay Area Populations                             Total (N=467)...
Survey Population   Survey Respondents by Age and Cycling Frequency                                    Infrequent   Freque...
Survey Population   Survey Respondents by Sex and Cycling Frequency                                     Infrequent   Frequ...
Survey PopulationRace and Ethnicity Comparison of Survey and Bay Area Populations                                         ...
Survey Population Survey Respondents by Race/Ethnicity and Cycling Frequency                                              ...
Survey PopulationIncome Comparison of Survey and Bay Area Populations                                            Total    ...
Survey Population   Survey Respondents by Income and Cycling Frequency                                         Infrequent ...
Survey ResultsPercentage of Respondents who Feel Safe Traveling on Different Street Types                                 ...
Survey ResultsPercentage of Respondents who Feel Safe Traveling on Different Street Types                                 ...
Survey ResultsPercentage of Respondents who Feel Safe Traveling on Different Street Types                                 ...
Survey ResultsThe Extent to which Safety Concerns “Strongly Influence” Potentialand Infrequent Cyclists, and “Always Worry”...
Survey ResultsThe Extent to which Safety Concerns “Strongly Influence” Potentialand Infrequent Cyclists, and “Always Worry”...
Survey ResultsThe Extent to which Safety Concerns Have “Some Influence” on Potentialand Infrequent Cyclists, and “Sometimes...
Survey ResultsPotentially Dangerous Incidents for Bicyclists – Bicyclists’ Self Report (n=273)                            ...
Survey ResultsPotentially Dangerous Incidents for Bicyclists – Bicyclists’ Self Report (n=273)                            ...
Survey ResultsPotentially Dangerous Incidents for Bicyclists – Bicyclists’ Self Report (n=273)                            ...
Survey ResultsInfluence of Collision and Near Miss Experiences on Worries about Safety                                     ...
Survey ResultsInfluence of the Experiences of Friends and Family on Worries about Safety                                   ...
Survey ResultsSignificant correlation (p < 0.10) between support for bicyclingin one’s city and the following worries about...
Limitations & Future Research• Systematic sample     • Internet/email population not representative     • Potential self-s...
Conclusions •  Frequent cyclists consistently affected by personal    experiences and those of friends and family •  Infre...
Next Steps•  Detailed crash analysis of Bay Area•  Exploration of attitudes, behaviors, and knowledge of   roadway laws an...
Thank you!             26
Upcoming SlideShare
Loading in …5
×

#9 New Research on Pedestrian and Bicycle Behavior: Perceptions, Attitudes, and Habits - Sanders

863 views

Published on

  • Be the first to comment

  • Be the first to like this

#9 New Research on Pedestrian and Bicycle Behavior: Perceptions, Attitudes, and Habits - Sanders

  1. 1. Exploring Traffic Danger for BicyclistsInitial Findings from a Recent Survey of Drivers and Bicyclists in the Bay Area Rebecca Sanders, UC Berkeley Pro Walk Pro Bike September 11, 2012
  2. 2. Overview•  Survey on perceived and actual bicycle danger•  Findings: Detecting trends –  Cyclist groups worry about different safety issues –  Frequent cyclists’ worries related to near misses and actual collisions for self, friends, and family –  Infrequent cyclists slightly affected by personal experiences and those of friends and family –  Potential cyclists slightly affected by experiences of friends and family –  Near misses need more attention –  Support for bicycling associated with worries about cycling 2
  3. 3. Methodology & Study Area• Internet survey• Convenience sample• 467 respondents (42% response rate)• Surveyed summer, 2011 2 30 7 95 74 226 14 3 Image credit: Bay Area Air Quality Management District 3
  4. 4. Survey PopulationAge Range and Sex Comparison of Survey and Bay Area Populations Total (N=467) *Bay Area (N=4,496,326) Age Range % % 18-24 6 9 25-34 36 15 35-44 18 15 45-54 21 15 55-64 16 12 65+ 4 12 Sex Male 45 49 Female 54 51 Source: U.S. Census Summary File 1, Table QT-P1 Age Groups and Sex 4
  5. 5. Survey Population Survey Respondents by Age and Cycling Frequency Infrequent Frequent Non-cyclists cyclists cyclists Age (n=194) (n=171) (n=102) Range % % % 18-24 4 5 10 25-34 34 35 41 35-44 18 18 17 45-54 16 29 16 55-64 21 11 16 65+ 7 2 - Chi-square significant p < 0.10 5
  6. 6. Survey Population Survey Respondents by Sex and Cycling Frequency Infrequent Frequent Non-cyclists cyclists cyclists (n=194) (n=171) (n=102) Sex % % % Male 33 56 48 Female 64 43 51 Chi-square significant p < 0.000 6
  7. 7. Survey PopulationRace and Ethnicity Comparison of Survey and Bay Area Populations Total *Bay Area (N=467) (N=4,496,326) Race/Ethnicity % %Caucasian/White 59 50Asian 15 23African American/Black 5 9Hispanic 5 22Native American/Alaska Native - 1Native Hawaiian/Pacific Islander 1 1Other 7 10Two or more races 4 6Source: U.S. Census Summary File 1, Table QT-P3 Race and Hispanic or Latino Origin 7
  8. 8. Survey Population Survey Respondents by Race/Ethnicity and Cycling Frequency Non- Infrequent Frequent cyclists cyclists cyclists (n=194) (n=171) (n=102) Race/Ethnicity % % % Caucasian/White 53 61 69 Asian 19 13 10 African American/Black 7 4 3 Hispanic 5 5 5 Native American/Alaska Native 1 - - Native Hawaiian/Pacific Islander 1 2 1 Other* 8 8 6 Two or more races 5 5 4 *Other included Indian and Middle Eastern Chi-square significant p < 0.10 8
  9. 9. Survey PopulationIncome Comparison of Survey and Bay Area Populations Total *Bay Area (N=467) (N=4,496,326) Annual HH Income % % < $35k 15 22 $35k-$49k 10 11 $50k-$74k 19 16 $75k-$99k 13 13 $100k-$149k 18 18 $150k + 12 19Source: 2010 American Community Survey, 5-Year Estimates, Table S-1901 Income in the Past 12 Months 9
  10. 10. Survey Population Survey Respondents by Income and Cycling Frequency Infrequent Frequent Non-cyclists cyclists cyclists Annual HH (n=194) (n=171) (n=102) Income % % % < $35k 15 12 17 $35k-$49k 12 9 8 $50k-$74k 19 19 20 $75k-$99k 13 13 13 $100k-$149k 14 22 20 $150k + 11 13 12 Chi-square not significant 10
  11. 11. Survey ResultsPercentage of Respondents who Feel Safe Traveling on Different Street Types Infrequent Frequent Non-cyclists cyclists cyclists Total (n=193) (n=171) (n=102) (N=466) % % % %ResidentialBicycle* 71 78 83 76Drive 89 91 89 90Walk 89 95 96 93CommercialBicycle 29 23 32 28Drive 73 74 67 72Walk* 76 81 85 80* Significant difference at level of p < 0.10 11
  12. 12. Survey ResultsPercentage of Respondents who Feel Safe Traveling on Different Street Types Infrequent Frequent Non-cyclists cyclists cyclists Total (n=193) (n=171) (n=102) (N=466) % % % %ResidentialBicycle* 71 78 83 76Drive 89 91 89 90Walk 89 95 96 93CommercialBicycle 29 23 32 28Drive 73 74 67 72Walk* 76 81 85 80* Significant difference at level of p < 0.10 12
  13. 13. Survey ResultsPercentage of Respondents who Feel Safe Traveling on Different Street Types Infrequent Frequent Non-cyclists cyclists cyclists Total (n=193) (n=171) (n=102) (N=466) % % % %ResidentialBicycle* 71 78 83 76Drive 89 91 89 90Walk 89 95 96 93CommercialBicycle 29 23 32 28Drive 73 74 67 72Walk* 76 81 85 80* Significant difference at level of p < 0.10 13
  14. 14. Survey ResultsThe Extent to which Safety Concerns “Strongly Influence” Potentialand Infrequent Cyclists, and “Always Worry” Frequent Cyclists 40% 30% 20% 10% 0% Ill be hit by an Drivers will drive Drivers will drive Ill be cut off while Ill make a mistake Ill be hit by a car Drivers will be inattentive driver too fast near me too close to me turning and hurt myself or door aggressive toward others me Potential Cyclists (n=148) Infrequent Cyclists (n=168) Frequent Cyclists (n=94) 14
  15. 15. Survey ResultsThe Extent to which Safety Concerns “Strongly Influence” Potentialand Infrequent Cyclists, and “Always Worry” Frequent Cyclists 40% 30% 20% 10% 0% Ill be hit by an Drivers will drive Drivers will drive Ill be cut off while Ill make a mistake Ill be hit by a car Drivers will be inattentive driver too fast near me too close to me turning and hurt myself or door aggressive toward others me Potential Cyclists (n=148) Infrequent Cyclists (n=168) Frequent Cyclists (n=94) 15
  16. 16. Survey ResultsThe Extent to which Safety Concerns Have “Some Influence” on Potentialand Infrequent Cyclists, and “Sometimes Worry” Frequent Cyclists 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Ill be hit by an Drivers will drive Drivers will drive Ill be cut off while Ill make a mistake Ill be hit by a car Drivers will be inattentive driver too fast near me too close to me turning and hurt myself or door aggressive toward others me Potential Cyclists (n=148) Infrequent Cyclists (n=168) Frequent Cyclists (n=94) 16
  17. 17. Survey ResultsPotentially Dangerous Incidents for Bicyclists – Bicyclists’ Self Report (n=273) Incident IncidenceCyclist was passed with fewer than 3 feet 65%Driver blocked bike lane while waiting for someone or parking 54%Driver/passenger opened car door and hit / almost hit cyclist 45%Driver hit / almost hit cyclist while turning 41%Driver honked / yelled at cyclist when s/he was not in the 42%wrongDriver merged into lane and hit / almost hit cyclist 31%Driver drove aggressively around cyclist 42%Driver tried to beat cyclist to a turn and hit / almost hit him/her 23%Driver blocked cyclist from merging into lane after cyclist 25%signaled
  18. 18. Survey ResultsPotentially Dangerous Incidents for Bicyclists – Bicyclists’ Self Report (n=273) Actually Incident Incidence hit?Cyclist was passed with fewer than 3 feet 65% 2%Driver blocked bike lane while waiting for someone or parking 54% 2%Driver/passenger opened car door and hit / almost hit cyclist 45% 6%Driver hit / almost hit cyclist while turning 41% 8%Driver honked / yelled at cyclist when s/he was not in the 42% 2%wrongDriver merged into lane and hit / almost hit cyclist 31% 4%Driver drove aggressively around cyclist 42% 2%Driver tried to beat cyclist to a turn and hit / almost hit him/her 23% 3%Driver blocked cyclist from merging into lane after cyclist 25% 1%signaled
  19. 19. Survey ResultsPotentially Dangerous Incidents for Bicyclists – Bicyclists’ Self Report (n=273) Actually Incident : Incident Incidence hit? HitCyclist was passed with fewer than 3 feet 65% 2% 29Driver blocked bike lane while waiting for someone or parking 54% 2% 37Driver/passenger opened car door and hit / almost hit cyclist 45% 6% 8Driver hit / almost hit cyclist while turning 41% 8% 5Driver honked / yelled at cyclist when s/he was not in the 42% 2% 23wrongDriver merged into lane and hit / almost hit cyclist 31% 4% 8Driver drove aggressively around cyclist 42% 2% 23Driver tried to beat cyclist to a turn and hit / almost hit him/her 23% 3% 8Driver blocked cyclist from merging into lane after cyclist 25% 1% 34signaled
  20. 20. Survey ResultsInfluence of Collision and Near Miss Experiences on Worries about Safety Related Collision Related Near Miss Potential Infrequent Frequent Potential Infrequent Frequent cyclist cyclist cyclist cyclist cyclist cyclist (n=145) (n=164) (n=93) (n=145) (n=164) (n=93) Worry about being cut off by a turning driver n/a * * n/a - *** Worry about being doored n/a - * n/a - *** Worry about drivers passing too close n/a - - n/a - * Worry about aggressive drivers n/a - - n/a - ***Significance indicated at the following levels: * p ≤ 0.10; ** p ≤ 0.01; *** p ≤ 0.001
  21. 21. Survey ResultsInfluence of the Experiences of Friends and Family on Worries about Safety You, friends, or family have You, friends, or family have crashed with a driver while crashed with a cyclist while driving bicycling Potential Infrequent Frequent Potential Infrequent Frequent cyclist cyclist cyclist cyclist cyclist cyclist (n=145) (n=164) (n=93) (n=145) (n=164) (n=93) Worry about being cut off by a turning driver - - * - - ** Worry about being doored * - - * - * Worry about drivers passing too close - - - - * - Worry about making a mistake - - * - - *Significance indicated at the following levels: * p ≤ 0.10; ** p ≤ 0.01; *** p ≤ 0.001
  22. 22. Survey ResultsSignificant correlation (p < 0.10) between support for bicyclingin one’s city and the following worries about safety:1.  Worry about being hit by a car door2.  Worry about aggressive driving3.  Worry about drivers passing too close4.  Worry about making a mistake that could hurt oneself or others5.  Worry about losing one’s balance
  23. 23. Limitations & Future Research• Systematic sample • Internet/email population not representative • Potential self-selection bias• Trip Diary • Count “near misses” and hits • Recall bias• Revised survey • Uniform scales 23
  24. 24. Conclusions •  Frequent cyclists consistently affected by personal experiences and those of friends and family •  Infrequent cyclists slightly affected by personal experiences and those of friends and family •  Potential cyclists –  Slightly affected by experiences of friends and family –  Worried about different occurrences than frequent cyclists –  More worried than frequent cyclists about most encounters •  Near misses influential and pervasive •  Significant relationship between worries about safety and support for bicycling 24
  25. 25. Next Steps•  Detailed crash analysis of Bay Area•  Exploration of attitudes, behaviors, and knowledge of roadway laws and their relationship to •  Perceived safety •  Roadway design preferences 25
  26. 26. Thank you! 26

×