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Improving Transportation Infrastructure
Transcript of Improving Transportation Infrastructure
By: Tyreese Garrick
Urban Sprawl: What is it?
The uncontrolled spread of urban development into neighboring regions.
Began accelerating after WWII
Vehicle population has grown 6 times faster than human population since 1969
Between 1970 and 1990, vehicle miles traveled increased 98% while population grew 23%
Suburban population has grown 10 times faster than central city population.
Vehicle vs. Human population in the U.S.A
For every 1000 people, there are 797 vehicles.
Problems: Challenges due to urban sprawl
Issues Concerning Vehicle Dependency
DC workforce: 671,000
Commuting via personal vehicle: 50% 240,500
Average one-way commute: 30 miles
CO2 emission: 1 gallon = 18 lbs
Total CO2 emission in one day
8.65 million pounds.
Equivalent of burning 1513 tons of coal.
Cost of permit
Lower GHG emission
For 100 miles traveled per person
Cars: 89 lbs CO2, Buses: 14 lbs CO2
Switching car to public transport saves $9,224
Congestion Socio-Economic Effects
Higher fuel costs
Lost business opportunities.
Reduced market areas;
Costs for additional crews and decentralized operations to serve the same market area.
Transit Oriented Development
Sufficient density to encourage public transit
Connect residences, jobs, and retail.
Mixed use development
Grid transportation network
Urban design guidelines and features.
Halts sprawl development
Mimicking DC and New York
What is it?
Achieving Transit Oriented Development
Using economic incentives
Example: DC Beltway
Northern VA HOT lanes
Developers paying for utilities
Efficiently implemented transit vs. Current Sprawl Model
GHG emission reduction
American population traveling from suburbs: 32% CO2 emission.
Key Concepts - Urban Sprawl and Transportation
Urban sprawl - definition, cause, and effects
Ways to combat urban sprawl