The role of 20 mph in delivering Healthy Streets Lucy Saunders FFPH Public Health Specialist
How do you measure how healthy a street is?
Objective Measures Injuries Air Quality My street Noise
Objective Measures Physical Activity
How do you measure how healthy a street is?
10 indicators of a Healthy Street
Easy to cross New York
Shade and shelter Sydney
Places to sop Places to stop Hackney Parklet
Not too noisy Not too noisy The Cut
People feel safe People feel safe Turnpike Lane DIY Streets
Things to see and do Things to see and do Copenhagen
People feel relaxed People feel relaxed Montreal Montreal
Clean air Clean air London Seoul
People choose to walk cycle People choose to walk and cycle Royal college street Montreal
Pedestrians from all walks of life People from all walks of life Van Gogh Walk
10 indicators of a Healthy Street
A street that works for people is a street that s good for health
How we turned these indicators into a measurement tool...
How do you make a tool valid for all types of street? 27
9 Street types
Objectives of our survey One tool that can be applied to all streets in London Asking people about their experience there & then Including experience elements noise, smell, feelings Differences between different types of street? Differences between experience & expectation?
Survey summary Attractive Clean air Noisy Enjoyable Ease of crossing Somewhere to rest Finding shelter Intimidation by traffic Stressful experience Safe from crime & antisocial behaviour Safe from road danger
Questions were grounded in the here and now Example question: How clean do you think the air on this street is today? Please give an answer between 0 and 10 where 0 means you think the air on this street is not at all clean and 10 means you think the air on this street is extremely clean Not at all Extremely 0 1 2 3 4 5 6 7 8 9 10 31
Questions were grounded in the here and now Example question: How clean do you think the air on this street is today? Please give an answer between 0 and 10 where 0 means you think the air on this street is not at all clean and 10 means you think the air on this street is extremely clean Not at all Extremely 0 1 2 3 4 5 6 7 8 9 10 How safe from crime and anti-social behaviour do you feel on this street today? Are you finding this street noisy? How easy do you think it would be to cross this street?
2014 and 2015 combined data 65 sample sites and 6,702 respondents Local significance Strategic significance 11 sites 1,239 respondents Core Road 7 sites 705 respondents Connector 8 sites 836 respondents 7 sites 715 respondents High Road 10 sites 1,108 respondents High Street 5 sites 447 respondents City Hub City Street Local Street Town Square City Place 8 sites 843 respondents 4 sites 348 respondents 5 sites 461 respondents Local significance Strategic significance
Analysis and Results
Average experience scores vary according to the Movement and Place axes 5.0 experience 5.3 experience 5.7 experience Core Road High Road City Hub/Boulevard Lower overall health score 5.6 experience 5.9 experience 5.6 experience Connector High Street City Street 6.4 experience 6.5 experience 6.6 experience Local Street Town Square/ Street City Place Higher overall health score
Expectation scores also vary but the effect of place and movement is different than for the experience scores 6.4 expectation 7.0 expectation 7.7 expectation Core Road High Road City Hub/Boulevard Lower overall health score 7.1 expectation 7.3 expectation 7.9 expectation Connector High Street City Street 7.4 expectation 7.6 expectation 7.2 expectation Local Street Town Square/ Street City Place Higher overall health score
Experience Expectation The distribution of scores shows a logical pattern, and that people seem able to temper their expectations 60 Arterial Road 60 High Road 60 City Hub 40 40 40 20 20 20 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 60 Connector 60 High Street 60 City Street 40 40 40 20 20 20 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 60 Local Street 60 Town Square 60 City Place 40 40 40 20 20 20 0 1 2 3 4 5 6 7 8 9 10 Average health score 0 1 2 3 4 5 6 7 8 9 10 Average health score 0 1 2 3 4 5 6 7 8 9 10 Average health score
Performance is below expectations on average across all healthy street indicators Experience Expectations Not too noisy Shade and shelter Places to stop 100 80 60 40 20 0 Not a stressful experience Easy to cross Safe from crime/anti social behaviour Safe from traffic injury Clean air Not too intimidated by traffic Attractive Enjoyable 38
Average score for each indicator
Conclusions Street types can be applied to the real world. People temper their expectations. Streets underperform compared to expectations. The most challenging streets are those with high movement and high place functions i.e. City Hub and City Street. Both movement and place functions affect healthy street scores. External and personal factors also affected scores. The healthy street indicators are inter-related: supports a whole-street approach. Survey now being used to see if it can measure changes in perceptions to evaluate impacts of new schemes...
20 mph and Healthy Streets Our survey results show that streets with less vehicle dominance score better across indicators. We don t know if reducing the speed limit to 20mph would improve scores. We have conducted baseline surveys in 2 locations on both Brixton High Street and Clapham High Street. Both of these streets are piloting 20 mph and we would like to see whether perceptions change when the speed limit is reduced.
20 mph and Healthy Streets
Objective measures of Healthy Streets We have developed a set of technical criteria for scoring against the Healthy Streets indicators. We have piloted this on a sample of schemes and found that the technical scores are generally below the experience and the expectations of the public.
lucysaunders@tfl.gov.uk