Streets: Intact for 1500 Years

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Streets Intact for 1500 Years
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Conventional
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Traditional
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Trip Assignment Conventional
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Trip Assignment Traditional
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Network and Capacity
2
2
4
2
Same Total Lanes
6
6
2

• More Capacity
• VMT
• Turns
• Clearance Time
• Signal Phase

2
4
10
Incremental Efficiency
800 600 400 200
Capacity of Additional Through Lane (VPH)
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Speed-Flow Relationship
60
50
40
Maximum Volume 25-30 Miles Per Hour
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Speed (MPH)
20
10
0
0
200
400
600
800
1000
1200
1400
1600
1800
2000
Hourly Vehicles Per Lane
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25th Moonwalk Anniversary
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Conventional Suburban Development
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Traditional Town Center
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Conventional Suburban Development
Traditional Town Center
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Sparse Versus Dense Networks
Single routing large switching load
Small link capacity
Small switching load
Many routings
2-Way Portable Business Radio 150, 450, 800, 900
mhz
Cellular telephone
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Support Map
Scope of Effort
Joint Private Public
Small Area Urban Designs, Site Designs
Form-Based Code
Design Guidelines (Standards)
Strategies Plan, Program
Public
Short Range
Long Range
Time Span
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Element 5

• Places to Stop

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Quality 5

• Permeability

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Quality 2

• Comfort

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Quality 6

• Respectful Buildings

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Quality 1

• Walkability

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Element 4

• Design Details

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Quality 8

• Good Desigan and Execution

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Element 2

• Starting and Finish Points

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Element 7

• People through
• Density

¼ Mile
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Element 6

• Accessible

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Quality 3

• Definition

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Element 12

• Time

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Evolution of Integrated Land Use and
Transportation Plans
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Pieces and Parts
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Pieces and Parts
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Pieces and Parts
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Pieces and Parts
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From Underground Up
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The Charette Key Three feedback loops in less
than a week
Source NCI National Charrette Institute
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Rural-to-Urban Transect
T1
T2
T3
T4
T5
T6
Drawings by James Wassell
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Cross-Section Elements
Drainage Parking Sidewalk Bikes Trees Lights
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Frontage Elements
Address Street
Enclose Street
Building Siting
Random
On Premise
Parking
Park-Once
Individual
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Network Elements
500-800
300-500
Street Spacing
Shared Controlled
Private, Uncontrolled
Street Access
Alley
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Differences with Form-Based Codes
2. De-emphasizes land use in favor of
building form and typology
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Angle at 500 Feet
THEME
Parking
Frontage
300 Ft
30 Ft
DRIVER CUE
Abstract, Point
Real, Linear
PARKING FORWARD
BUILDING FORWARD
DESIGN SPEED
50-60 mph
20-30 mph
Building Site
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Supermarket - Bad
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Supermarket - Good
Andrews Avenue, Fort Lauderdale
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Photo by Payton Chung
Supermarket - Good
Atlantic Station, Atlanta
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Self-Storage Facility - Bad
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Home Depot - Bad
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Photo by Payton Chung
Home Depot - Good
Halsted Street, Chicago
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Fast Food Franchise - Good
Orange Avenue, Orlando
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Park-Once Parking
2-Faced
Continuous Vibrant Walk
1-Faced
3-Faced
Low Threshold
Off-Street Parking
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Put the Fat Chicken Out Front David
Butterfield
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Face 2 Parking Lot
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Face 1- Town Center
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Face 2 - Boulevard
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Face 3 - Parking Lot
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Exclusive Parking
Office
TOTAL SPACES
Restaurant
5 1/2 6 per 1,000 sf
EMPTY
Entertainment
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Noon
6
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Shared Parking
Restaurant
Entertainment
TOTAL SPACES
2 1/2 3 per 1,000 sf
Office
6
Noon
6
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Parking

• Not enough?
• No Public parking
• Negative first impression
• No enforcement of street parking
• Predatory towing
• No on-street on Cumberland

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• 121 Spaces
• High Occupancy
• Park-once District
• Public, not Private
• Drop Off
• E-Commerce
• Pedestrians
• Safety

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Support Map
Scope of Effort
Joint Private Public
Small Area Urban Designs, Site Designs
Form-Based Code
Design Guidelines (Standards)
Strategies Plan, Program
Public
Short Range
Long Range
Time Span
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Ideal Traffic Planning
Widen
20-Year Forecast
Capacity
Years
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Traffic Planning The Reality
Actual
Widen
Induced Traffic
Forecast
Capacity
Years
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Road Size, Not Congestion is the Choice
Congestion
Widen
Congestion
Widen
Traffic
Congestion
Capacity
Years
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Trying to cure traffic congestion with more
capacity is like trying to cure obesity by
loosening your belt
- Glen Heimstra, Futurist
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Road Size, Not Congestion is the Choice
No Option
Congestion
Widen
Reduced Options
Congestion
Widen
Choice
Traffic
Congestion
Capacity
Years
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Supply and Demand
New Market Price Points
Price
Old Policy
Demand
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Rerouting Chain Reaction
Main Street
Bypass
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LOS Versus Capacity
95-100
Rail Transit Mixed Destinations Mixed
Origins/Destinations Network Flex Peak
Shift Actual Capacity
20
200 150 100 80 60 40 20 0
15
30
15
20
5
5
E D C B A
E D C B A
7
7
16
16
22
22
50
50
Traffic Level of Service
Transportation Capacity
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Downtown Norfolk Travel Profiles
TRIPS
Entertainment
Office Commute
Community College
Shop
Visitor
6 am 9am 12am 3pm 6pm 9pm
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People will get sick and tired of traffic
congestion and...
Karl Rasmussen State Traffic Engineer, Minnesota
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and move into the city.
Karl Rasmussen State Traffic Engineer, Minnesota
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Support Map
Scope of Effort
Joint Private Public
Small Area Urban Designs, Site Designs
Form-Based Code
Design Guidelines (Standards)
Strategies Plan, Program
Public
Short Range
Long Range
Time Span
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