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Published byGary Robbins Modified over 9 years ago
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20 mph - The Cambridge Experience John Richards Acting Project Delivery & Environment Manager
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Background to Cambridge 20 mph Challenges facing City’sinfrastructure: Compact city of 120,000 residents, seasonal students and visitors Historic core Highest cycling rates in UK Road casualties Growth, congestion and pollution Existing 20 mph areas have proved popular!
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History Early safety driven schemes date from late 80s/early 90s Engineering ‘heavy’ Awareness of changing national landscape around lower speeds 2010 ‘Trial’ schemes based on signing/road markings alone Central area within inner ring road Wulfstan Way / Gunhild Way late 1940s residential estate
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Objectives City-wide 20 mph consistency, rationalise existing areas and signage Facilitate active and sustainable travel modes Health and congestion benefits Improve safety and feeling of security Reduce noise and pollution Environmental improvement
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New beginnings… Project established through 2011 motion to Council City-wide approach Cross party support £600k Capital budget over 3 years Light not heavy handed approach, based on signing and road marking changes Self enforcing
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Consider the function of streets and 20 mph as a catalyst for potential change…
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Routes for movement… ‘Thoroughfare’ dominates e.g. ‘A’ and ‘B’ category roads generally unsuited to 20 mph…
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Routes for access… Thoroughfare less dominant e.g. residential and shopping streets generally suited to 20 mph…
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But what about those in between? e.g. ‘C’ class or distributor roads these are different sections of same road….
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Recommendations based upon: Function of route within hierarchy Road and traffic characteristics Existing traffic speeds (comprehensive surveys) Levels of public support
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Approach Phased implementation over 2-3 years Efficient mix of zones and limits Engagement centred around 4 Area Committees 132 miles, or 85% of city’s roads, included Project Board aligns key stakeholders and processes (e.g. County Council as Highway Authority)
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High Public Engagement expectations Approx. 60,000 consultation packs delivered to all city addresses Project web page and online questionnaire Public exhibitions Press releases and social media Area Committee and Environment Scrutiny Committee consideration Opportunity for public to have say and help shape – encourages ownership
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Consultation headlines Approx. 11,000 responses, 18% return rate < 4% non city residents > 2 to 1 in favour Mixed support on ‘C’ road suitability Key concerns: enforcement and worsening congestion Popular misconceptions
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Implementation Progress Phase 3 (South and West / Central areas) consultation completed, member review, target implementation next 12 months Phase 1 (North area) completed Phase 2 (East area) TROs in place, implementation Spring 2015
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Victoria Road A busy ‘A’ class route forming part of the city’s inner ring road Considered ineligible for 20 mph given County policy that excludes ‘A’ and ‘B’ class roads Road and usage characteristics similar to many ‘C’ class routes included Public demand and political support Agreement to advertise, objections determined (by County Council) and now included within project scope
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Post implementation monitoring (north area) On 93% of streets previously above 20 mph, speeds have reduced Average reduction 1-2 mph typical 3 mph reduction on a busy ‘C’ road (Arbury Road) Average speeds on roads included now below 24mph, with 56% below 20mph
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Further work Complete city-wide (realise maximum benefit) Marketing (hearts & minds) and promotion Enforcement (carrot and stick) Monitoring of: Travel choices Traffic speeds Casualties Air quality and noise Public perceptions, and satisfaction?
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Lessons Development phase Design phase Implementation phase
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Development phase learning Ensure sound evidence base Adequately resource, plan and programme Establish governance and processes Challenge assumptions Flexibility around road and user characteristics rather than classification
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Design phase learning Care around sign positioning Administrative boundaries New developments
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Design phase learning Care around sign positioning Administrative boundaries New developments
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Design phase learning Care around sign positioning Administrative boundaries New developments
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Implementation phase learning Effective procurement and early provider involvement Forward visibility of programme and constraints Street Works liaison ‘Right first time’ construction
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Future challenges Scrutiny around ‘value for money’ Compliance and need for enforcement Public acceptance and ownership Maintaining advocacy message Dealing with inconsistencies and problem streets Project integrity What next?
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Thank you John Richards John.richards@cambridge.gov.uk 01223 458525 Consider widespread 20 mph coverage as a step change in public attitudes around healthy, living, cities And finally…
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