Exhaustive Study Notes: Shaping Cities for a Sustainable Future

The Dual Challenge: The global community is currently facing the simultaneous task of solving for climate change while building cities to accommodate $3,000,000,000$ people.
The Scale of Growth: This growth represents a doubling of the existing urban environment.
The Stakes for Humanity: If urban development is not executed correctly, climate change solutions may be insufficient to save mankind. City design impacts: * Environmental sustainability. * Social well-being. * Economic vitality. * The sense of community and connectedness.
Philosophy of Urbanism: The way cities are shaped is a fundamental manifestation of the humanity brought to bear on the environment.
The Behavioral Driver: Climate change is not a "free-floating" problem or the sole fault of companies like ExxonMobil or other oil giants; it is driven by human behavior and "how we live."

Definition of Sprawl: While often perceived as low-density development at the metropolitan periphery, sprawl is defined by the speaker as an attribute that can happen at any density.
Key Characteristics of Sprawl: * It isolates and segregates people into economic and land-use enclaves. * It separates human beings from nature. * It prevents "cross-fertilization" and the social interaction required for a society to thrive.
The Necessity of an Antidote: Finding an alternative to sprawl is critical during the massive construction project of current global urban expansion.

The Model: A model was developed for the State of California to assist in carbon emission reduction strategies through the year $2050$ .
The Forecast: The state is expected to add $10,000,000$ new residents by $2050$ .
Scenario A (Sprawl): Focused on "more of the same," including shopping malls, subdivisions, and office parks.
Scenario B (Compact Development): Focused on walkable neighborhoods, streetcar suburbs, and low-rise, integrated, mixed-use environments.
The Concept of "Co-Benefits": Urban form creates overlapping benefits that allow disparate special interest groups (environmentalists, farmers, neighborhood groups) to align their goals.

Land Consumption: The sprawl version of California's future would nearly double the physical urban footprint compared to compact development.
Greenhouse Gas (GHG) Emissions: Major savings are found in compact cities because the largest source of carbon emissions in California is personal automobiles.
Vehicle Miles Traveled (VMT): * Average household VMT in a sprawl scenario is approximately $26,000\,miles$ per year. * Compact development reduces this by $10,000\,miles$ per household per year. * This reduction directly impacts air quality, carbon output, and the household budget.
Public Health: Compact cities encourage walking and cycling while reducing pollution, addressing health issues at the source rather than just treating symptoms.
Household Costs and the Middle Class: * The $2008$ financial crisis was partially driven by over-production of the "wrong kind" of housing: large-lot, single-family homes in distant locations that were too expensive for the average family. * Economic pressure: Reducing household costs by $10,000\,USD$ (covering cars and utility costs) is significant, given the California median income is $50,000\,USD$ .

Shift in Policy: Since $2008$ , Los Angeles has shifted from a car-centric model to a transit-oriented environment.
Investment Statistics: The city voted in $400,000,000,000\,USD$ in bonds for transit and $0\,USD$ for new highways.
The Implementation Strategy: * Identify the least desirable land (strip developments). * Add transit where space permits. * Infill with mixed-use development to satisfy housing demand. * Make existing neighborhoods more walkable, complex, and interesting.

The Oxymoron of High-Density Sprawl: China exhibits high density but retains the isolation of sprawl through "superblocks."
Economic Impact of Smog: China currently spends $12\%$ of its GDP on the health impacts of smog.
The Loss of Community: Traditional Chinese cities were based on small, local shops and neighbors interacting via walking. Current superblocks can contain $5,000$ units, are gated, and often lack sidewalks or ground-floor commerce.
The "Illicit" Service Economy: Residents in some superblocks set up shops in garages to recreate the local service economy they desire.

Scale: Chongqing is a city of $30,000,000$ people, nearly the size of California's population.
Planning Alternative: A growth area for $4,500,000$ people was designed as an alternative to sprawl.
Design Elements: * Walking Radii: Concentric circles represent walking distances around transit stations (Metro and BRT). * Ecological Preservation: Principles called for green spaces to preserve ecological features. * Auto-Free Streets: Streets were designed without cars, avoiding the normative practice of bulldozing to the river's edge. * Small Blocks: Focused on blocks of roughly $500$ families to ensure neighbors know each other and to provide street-level shops.

Principle 1: Preserve: Protect the natural environment, history, and critical agriculture.
Principle 2: Mix: Implement mixed-use land, mixed incomes, and mixed age groups.
Principle 3: Walk: Create environments where walking is enjoyable.
Principle 4: Bike: Prioritize the most efficient means of transport. China has adopted policies for $6-meter$ bike lanes on every street.
Principle 5: Connect: Utilize a street network that allows many routes and various types of streets rather than singular, specialized roads.
Principle 6: Ride: Invest heavily in transit. Autonomous vehicles are not seen as a "silver bullet."
Principle 7: Focus: Organize the city hierarchy based on transit rather than the armature of freeways.

Chris Anderson (CA): "So, OK: autonomous driving, self-driving cars. A lot of people here are very excited about them. What are your concerns or issues about them?"
Peter Calthorpe (PC): He expresses concern regarding the "hype" and argues that while people believe cars will be removed, the reality will be more vehicle miles traveled (VMT) and increased congestion.
CA: "Because they're so appealing -- you can drive while reading or sleeping."
PC Concerns on AVs: * Revitalizing Sprawl: If people can work while commuting, they will live in even more remote locations, giving sprawl a "new lease on life." * Efficiency and Sharing: Surveys suggest $50\%$ of people will not share autonomous taxis. If they do not share, VMT could increase by $90\%$ . Even with sharing, VMT would likely increase by $30\%$ . * The Core Solution: PC maintains that walking, biking, and transit are the only ways for communities to thrive. Putting people in "private bubbles," whether they have steering wheels or not, is the wrong direction. * Random Errands: He finds the image of an empty AV being sent on random errands (e.g., to McDonald's) to be "frightening."