Block Length Limits* Salem, OR 600 ft (180 m) Portland, OR Davidson, NC Raleigh, NC Fort Collins, CO Boulder, CO 530 ft 600 ft 1,500 ft Max block size (7-12 acres) 350 ft (by practice) * With exceptions for topography or special circumstances. Intro: 125
Abu Dhabi: Limited Connectivity 18 lanes of through traffic Up to 2,000 vehicles per lane hour Up to 36,000 vehicles per hour Intro: 126
Vancouver: High Connectivity 100 lanes of through traffic Up to 700 vehicles per lane hour Up to 70,000 vehicles per hour No freeways = twice the capacity! Intro: 127
Safety Intro: 128
Safety Intro: 129
Safety Intro: 130
Safety Intro: 131
Strong Emphasis on Safety Intro: 132
Strong Emphasis on Safety Intro: 133
Lane Width Studies on lane widths report mixed results, with some studies finding wider lanes are safer, and other finding wider lanes are more dangerous. In general, lane widths appear to have a U shaped relationship with crash performance, with crashes decreasing until lane widths reach roughly 11.5 feet, and increasing thereafter. Sources: Clark, 1985; Dumbaugh, 2005; Farouki and Nixon, 1976; Fitzpatrick et al., 2001; Gattis and Watts, 1999; Harwood, 1990; Hauer, 1999; Heimbach et al., 1983; Lee and Mannering, 1999; Noland and Oh, 2004; Zegeer, Deen and Mayes,1981. Intro: 134
Number of Lanes Studies consistently find that adding lanes increases crashes, while eliminating lanes though road diet projects decreases crashes. Sources: Dumbaugh, 2005; Harwood, 1986; Harwood,1990; Huang, Stewart, and Zegeer, 2001; Knapp and Giese, 2001; Milton and Mannering, 1998; Noland and Oh, 2004; Sawalha and Sayed (2001); Vitalano and Held 1991. Intro: 135
Key Design Principles 1. The best transport plan is a good land use plan 2. Good street design starts with pedestrians 3. A well-designed street network provides safety for all modes of transport 4. Street connectivity enhances capacity and allows smooth traffic flow 5. Street design reflects Plan 2030 goals for Abu Dhabi Emirate 6. Street design supports estidama principles Chapter 1: 136
Design Principles Good & Bad Chapter 1: 137
Manual Goals 1. Land use context 2. Safety 3. Efficiency 4. Sustainability 5. Public Health 6. Public Enjoyment 7. Economic Development and Tourism 8. Culture and Image The design of the public realm should respect local culture & traditions Chapter 1: 138
Conventional Approach Chapter 2: 139
Changing Land Use Context Chapter 2: 140
Changing Land Use Context Liwa Road in Madinat Zayed Chapter 2: 141
NEW STREET TYPOLOGIES: BOULEVARD WITH FRONTAGE LANE (CITY CONTEXT) SIDEWALKS TRAVEL LANES MEDIANS STREET DESIGN MANUAL Chapter 2: 142
NEW STREET TYPOLOGIES SIDEWALKS CYCLE TRACK PUBLIC TRANSIT TRAVEL LANES MEDIANS STREET DESIGN MANUAL Chapter 2: 143
COMPLETE STREETS: BALANCE BETWEEN MOBILITY, PEDESTRIAN COMFORT & VISUAL ATTRACTIVENESS STREET DESIGN MANUAL Chapter 2: 144
Naming Combinations Chapter 2: 145
Street Typology Examples Chapter 2: 146
COMPLETE STREETS: BALAN BETWEEN MOBILITY, PEDESTRIAN COMFORT & VISUAL ATTRACTIVENESS STREET DESIGN MANUAL Chapter 2: 147
URBAN DESIGN FUNCTION AND AESTHETIC CONSIDERATIONS STREET DESIGN MANUAL Chapter 2: 148
Vehicle Speeds Chapter 3: 149
Design Process Chapter 4: 150
1. Determine and arrange land uses Chapter 4: 151
2. Identify Pedestrian Networks Chapter 4: 152
3. Identify Transit Networks Chapter 4: 153
4. Identify bicycle networks Chapter 4: 154
5. Identify and develop vehicle networks Chapter 4: 155
6. Determine street cross sections Chapter 4: 156
7. Transfer into plan Chapter 4: 157
8. Locate street elements Chapter 4: 158
9. Note interaction areas on plan Chapter 4: 159
10. Rationalize solutions Chapter 4: 160
11. Begin urban design and landscape planning Chapter 4: 161
Apply performance measures Chapter 4: 162
Category 1 Exception Category 2 Exception Exceptions Integration with the approvals process Extract from UPC s Development Review Process Chapter 4: 163
Integrating the Design Process with the UPC s Approval Process
Street Design Elements Prioritization Chapter 5: 165
Pedestrian Realm Zones Chapter 5: 166
Standard City Dimensions Chapter 5: 167
City Cross-Sections Chapter 5: 168
Standard Town Dimensions Chapter 5: 169
Town Cross-Sections Chapter 5: 170
Mushtarak Cross-Sections & Examples One-way Street Sikka Shared Access Lane Mushtarak in Abu Dhabi Sikka example in Abu Dhabi Chapter 5: 171
Pedestrian Crossing Location Chapter 5: 172
Metro Tram Bus Rapid Transit Advantages and Disadvantages Of Center, Side, and Sidewalk- Running Tram High quality Metro station entrance Paris, France High quality tram station Minneapolis, USA Chapter 5: 173
Bus Taxis Private Transit Comparison of Near, Far, and Midblock Bus Stops Bus Rapid Transit on boulevard Mexico City, Mexico Chapter 5: 174
Bicycle Facility Type Cycle Track along Taxi and Private Bus Lay-By Cycle Track along Bus Stop Chapter 5: 175
Examples of Bicycle Facilities Typical Cycle Track Typical Bicycle Lane with Parking and Door Zone Typical Yield Lane with Sharrow Marking for Shared Lane Chapter 5: 176
Bicycle Facilities at Junctions Cycle Track through Minor Junction Bicycle box, surfaced in the same color as the bicycle lane Shared Waiting Space for Bicyclists and Pedestrians at Junction Chapter 5: 177
Junction Design Junction Types Junction Layout Typical Boulevard Junction with Tram Chapter 5: 178
Junction Spacing Maximum Town Junction Spacing Through Street Spacing Criteria (meters) Control Measures Chapter 5: 179
Sight Distance Curb Extension Increases Visibility Design Vehicle Junction Control Matrix Sight Distance Requirements Corners Designed for Trucks Allow High Car Speeds Chapter 5: 180
Corner Radii Actual Versus Effective Turning Radius Example of Swept Path Simulation Chapter 5: 181
Traffic Calming Principles & Approaches Relationship between speed and pedestrian fatality Typical Raised Intersection Typical Speed Table Typical Speed Cushions Typical Raised Crossing Chapter 5: 182
PEDESTRIAN REALM ZONES STREET DESIGN MANUAL Chapter 6: 183
STREET DESIGN MANUAL
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Jeffrey Tumlin 116 New Montgomery St, Suite 500 San Francisco CA 94105 (415) 284-1544 jtumlin@nelsonnygaard.com NELSON\NYGAARD CONSULTING ASSOCIATES 2011