design of urban street networks norman w. garrick lecture 8
TRANSCRIPT
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Design of Urban Street Networks
Norman W. GarrickLecture 8
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Designing Connected Networks
www.cnu.org/sites/www.cnu.org/files/sustainable_street_network_principles_op.pdf
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Principles or Goals of Sustainable Street Network Design
1. Support community and place2. Attract and sustain economic activities3. Maximize transportation choice4. Integrate with natural systems5. Respect the existing natural and built environment6. Emphasis walking as the fundamental unit of design7. Work with other transportation networks
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Characteristicsof a Sustainable Street Network
1. Maximize Connectivity2. Provide Multiple Location where Different Transportation
Networks Overlap3. The network should be complex – rather than flat4. Major Streets should be Multimodal and Frequent5. All Streets should be Walkable6. Wide variety of street types
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Portmore, Jamaica – Regional Context
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Portmore – City Context
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Portmore – Neighborhood Context
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Assessing PortmoreOn Street Network Characteristics
1. Maximize ConnectivityRegional Scale – NoCity Wide Scale – NoNeighborhood - No
2. Provide Multiple Location where Different Transportation Networks OverlapMarginal
3. The network should be complex – rather than flatNo – flat design
4. Major Streets should be Multimodal and FrequentMajor streets design for cars/too sparse
5. All Streets should be WalkableMajor streets not walkable
6. Wide variety of street typesTwo or three street types at most
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Prenzlauer Berg – Regional Context
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Prenzlauer Berg – City Context
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Prenzlauerberg
Berlin
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The Streets of Prenzlauer Berg
Schoenhauser AlleeThe main street
Prenzlauer AlleeThe second main
street
PappelalleeA neighborhood shopping
street
RaumerstrasseA neighborhood shopping
street
Goehrener StrasseA residential street
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Assessing Prenzlauer BergOn Street Network Characteristics
1. Maximize ConnectivityRegional Scale – YesCity Wide Scale – YesNeighborhood - Yes
2. Provide Multiple Location where Different Transportation Networks OverlapVery Good
3. The network should be complex – rather than flatVery complex in terms of street types and types of connections
4. Major Streets should be Multimodal and FrequentMajor streets multimodal and frequent
5. All Streets should be WalkableMajor streets are all walkable
6. Wide variety of street typesNumerous street types
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Factors in Creating Diverse Street Type
What are the factors contributing to difference between streets types?
• Street cross-section design• Continuity of the street in the network• Type of intersection connection in the street network• Street alignment in the street network
Note that these are a combination of 1) Features of the street itself, and 2) Features of the street network.
For the best results, the street design should complement the street network design
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Schoenhauser AlleeThe main
street
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Schoenhauser AlleeThe main
street
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Schoenhauser AlleeThe main
street
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Prenzlauer AlleeThe second main street
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PappelalleeA neighborhood shopping
street
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PappelalleeA neighborhood shopping
street
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RaumerstrasseA neighborhood shopping
street
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Greigenhagener Strassesimilar to Goehrener Strasse
A residential street