![Page 1: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/1.jpg)
![Page 2: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/2.jpg)
Davis, CA14 % of people ride to work
![Page 3: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/3.jpg)
Davis, CA
Road Fatality Rate: 1 per 100,000
![Page 4: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/4.jpg)
Road Fatality Rate for All 157 California Cities Over 40,000
number per 100,000 population
0.0
17.3
![Page 5: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/5.jpg)
Road Fatality Rate for All 157 California Cities Over 40,000
number per 100,000 population
![Page 6: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/6.jpg)
![Page 7: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/7.jpg)
Risk of Fatality
(Fatalities as % of Injuries) California Cities of 40,000 to 120,000
![Page 8: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/8.jpg)
![Page 9: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/9.jpg)
Adapted from Stephen Marshall
Pre-1950’s Post-1950’s
Evolution of the Street Network
![Page 10: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/10.jpg)
![Page 11: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/11.jpg)
![Page 12: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/12.jpg)
FHA Technical Bulletin No. 7 (1938)Planning Profitable Neighborhoods
![Page 13: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/13.jpg)
According to the FHA the grid layout was
MonotonousHad Little CharacterUneconomicalPosed Safety Concerns
![Page 14: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/14.jpg)
Street network, safety and sustainability in 24 medium sized California cities
Cities selected to represent a range of traffic safety level
![Page 15: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/15.jpg)
![Page 16: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/16.jpg)
Shape and Configuration
Network Scale
Network Connectivity
![Page 17: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/17.jpg)
Citywide Street NetworkNeighborhood Street Network
Linear Tree GridTributary Radial
Grid
Tree
Adapted from Stephen Marshall, Streets & Patterns
![Page 18: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/18.jpg)
550 Intersections per Square Mile
Network Scale
![Page 19: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/19.jpg)
110 Intersections per Square Mile
Network Scale
![Page 20: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/20.jpg)
45 Intersections per Square Mile
Network Scale
![Page 21: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/21.jpg)
Link-to-Node Ratio = 1.61
Link-to-Node Ratio = 1.13
Link-to-Node Ratio = 1.16
Network Connectivity
![Page 22: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/22.jpg)
Street Network Properties
Street Design Properties
Average Total Number of LanesAverage Outside Shoulder WidthRaised MedianPainted MedianOn-Street ParkingBike LanesRaised Curbs
Travel and Activity Level
Distance from City Center
Income
Mix of Land Use
Variables included in Our Safety and Travel Choice Models
![Page 23: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/23.jpg)
Safety Analysis Based on Geo-coding 230,000 Accident Recordsin 24 California Cities
![Page 24: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/24.jpg)
Safety and Travel Choice Analysis done for 1040 Census Block Groups 24 California Cities
![Page 25: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/25.jpg)
Travel Choice Based on Census Data1040 Census Block Groups, 24 California Cities
![Page 26: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/26.jpg)
versus
![Page 27: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/27.jpg)
versus
SafetyRisk of Severe Injury or Fatality
Chance of being Severely Injured
30% Higher
Chance of being Killed
50% Higher
![Page 28: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/28.jpg)
Odds of Dying in a Road Accident based on Intersection Density
1 in 200
1 in 500
![Page 29: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/29.jpg)
Percentage of People Walking, Biking or Taking Transit
![Page 30: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/30.jpg)
Percentage of People Walking, Biking or Taking TransitEffect of Intersection Density for Cul-de-sac Network
![Page 31: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/31.jpg)
Percentage of People Walking, Biking or Taking TransitEffect of Intersection Density for Gridded Network
![Page 32: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/32.jpg)
Thanks to
US EPA and CNU
![Page 33: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/33.jpg)
28,000
14,000
8,000
![Page 34: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/34.jpg)
15,000
11,000
14,000
11,000
![Page 35: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/35.jpg)
8,346
10,52412,831
8,600
2,461
28,820
7,518
6,774
![Page 36: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/36.jpg)
16,186
10,364
13,154
24,283
5,898
15,547
17,107
![Page 37: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/37.jpg)
Davis: Response Time
14.9 mph
14.2 mph
12.7 mph
![Page 38: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/38.jpg)
![Page 39: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/39.jpg)
![Page 40: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/40.jpg)
![Page 41: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/41.jpg)
![Page 42: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/42.jpg)
Downtown Hartford 1960 to 2000 Parking
![Page 43: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/43.jpg)
City of Hartford 1960 to 2000 Population and Employment
![Page 44: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/44.jpg)
Evolution of Network in California Cities
![Page 45: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/45.jpg)
Norman W. Garrick
![Page 46: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/46.jpg)
Norman W. Garrick
11 X
2 X
![Page 47: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/47.jpg)
![Page 48: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/48.jpg)
Norman W. Garrick
Sustainability Gap
USA
Norway
Daily Miles TraveledFor every man, woman and child
![Page 49: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/49.jpg)
![Page 50: Street Networks: Traffic Safety, Travel Mode Choice and Emergency Services](https://reader038.vdocument.in/reader038/viewer/2022103115/558404b0d8b42aa82c8b535a/html5/thumbnails/50.jpg)
Working on Detroit