WORLD WRI ROSS CENTER FOR RESOURCES SUSTAINABLE INSTITUTE CITIES CITIES SAFER BY DESIGN Guidance and Examples to Promote Traffic Safety through Urban and Street Design VERSION 1.0 WRICITIES.ORG Cities Safer by Design i BEN WELLE QINGNAN LIU WEI LI CLAUDIA ADRIAZOLA- STEIL ROBIN KING CLAUDIO SARMIENTO MARTA OBELHEIRO This report was made possible through funding from Bloomberg Philanthropies. Design and layout by: Jen Lockard
[email protected] TABLE OF CONTENTS 1 Foreword 44 Pedestrian Crossings 46 Medians 3 Executive Summary 47 Median Refuge Islands 48 Signal Control 11 Traffic Safety for People 49 Lane Balance 12 Traffic Safety Across Selected World Cities 14 Nearly All Urban Dwellers are Affected by 53 Pedestrian Spaces and Access Traffic Safety in Cities to Public Space 15 Creating a Safer System for All People: 55 Basics of Safe Sidewalks Reducing Exposure and Risks 57 Shared Streets 18 Analyzing Traffic Safety in Cities 58 Pedestrian Streets and Zones 18 Performance Measures 59 Safe Places to Learn and Play 60 Open Streets 21 Key Urban Design Elements 61 Street Plazas 23 Block Size 24 Connectivity 65 Bicycle Infrastructure 25 Vehicle/Travel Lane Width 67 Bicycle Networks 26 Access to Destinations 68 Bike Lanes and Cycle Tracks 27 Population Density 70 Off-street Trails 71 Shared Bicycle Street 29 Traffic Calming Measures 72 Bicycle Safety at Intersections 31 Speed Humps 74 Bike Safety at Bus Stops 33 Speed Cushions 75 Bicycle Signals 34 Chicanes 35 Chokers 79 Safe Access to Transit Stations and Stops 36 Curb Extensions 82 Intersections with Bus Corridors 37 Raised Intersections/Crossings 83 Midblock Crossings 38 Traffic Circles 84 BRT/Busway Stations 39 Roundabouts 85 Terminals and Transfers 41 Arterial Corridors and Junctions 89 Conclusion 43 Arterials 92 References BICYCLE INFRASTRUCTURE Bicyclists require special attention in street design as they are one of the most vulnerable users in terms of traffic fatalities and injuries, yet an increase in safety and usage can lead to greater health and environmental benefits.