Hear us out: We ban left turns and other big ideas

Episode Summary

Executive Summary: Planet Money presents three unconventional policy ideas from economists and an engineer: banning left turns in downtown traffic, giving every child a "baby bond" trust account at birth to reduce wealth inequality, and replacing U.S. district-based winner-take-all elections with proportional representation. Each proposal is framed as a practical fix for inefficiency, inequality, or democratic dysfunction.

Main Topics: Banning left turns to improve traffic flow (Priority: 5/5): Civil engineer Vakash Gaia argues that left turns cause dangerous intersection conflicts and traffic delays, especially downtown. He says banning them can reduce crashes and speed trips, even if drivers travel a bit farther via right turns. Traffic simulation and efficiency tradeoffs (Priority: 5/5): The episode explains that while left-turn bans increase distance for some drivers, network-wide trip times may fall because fewer vehicles wait at intersections. The argument emphasizes system-level efficiency over individual convenience. Baby bonds as a wealth-building policy (Priority: 5/5): Economist Derek Hamilton proposes universal trust accounts at birth that grow according to family wealth, giving low-wealth children capital to buy homes, pay tuition, start businesses, or save for retirement. Closing the racial wealth gap (Priority: 5/5): Hamilton frames baby bonds as a way to address the persistent racial wealth gap by giving poor children access to assets, not just income support, and by correcting for historical policy advantages that built white wealth. Reforming U.S. elections through proportional representation (Priority: 5/5): Economist Daron Acemoglu argues that winner-take-all congressional districts fuel polarization and weak representation, and proposes party-list proportional representation to better match seats to votes. Democracy, polarization, and economic performance (Priority: 4/5): Acemoglu connects democratic health to economic outcomes, arguing that democracy improves growth and public health while gridlock and malfunction harm markets and institutions.

Key Arguments: Left turns are dangerous because they require crossing oncoming traffic, and a large share of crashes happen at intersections. Banning left turns can increase average trip speed at the network level because it reduces waiting and intersection conflicts. Baby bonds would provide all children with a capital base, but larger contributions would go to children from wealth-poor families. Wealth inequality cannot be solved by education or effort alone because wealth tends to compound and inherit policy advantages. Proportional representation would ensure that more voters are represented in Congress instead of leaving 49% with no seat outcome in a district. Party-list systems could reduce extremism because candidates would need broader appeal to rank higher on a party slate. Democratic stability matters economically because democratic countries tend to grow faster and have better health outcomes.

Data Points: Share of U.S. car crashes at intersections: about 40% - Used to support the argument that left turns contribute to dangerous intersection crashes. Traffic simulation combinations tested: 65,000 combinations - Vakash Gaia modeled many downtown intersection scenarios to measure the effect of banning left turns. Average added driving distance: one extra block - On average, banning left turns would make all drivers travel only slightly farther. Net trip time effect: shorter on average - Despite added distance, overall trip completion time would be reduced because of less waiting. Initial baby bond amount: $1,000 - Every baby would receive this amount at birth in Derek Hamilton's proposal. Annual supplemental amount for wealth-poor families: $2,000 per year until age 18 - Example of the larger deposits targeted to children from poorer families. Annual supplemental amount for medium-wealth families: $500 per year - Illustrative mid-tier contribution in the baby bond structure. Potential account value at age 18: $50,000 or more - Projected amount for a child born into a wealth-poor family with compound interest. Estimated wealth gap among young adults: white young adults were 1,500% wealthier than black young adults in 2015 - Cited from Naomi Zodi's study to show the scale of the wealth gap. Projected wealth gap with baby bonds: 40% wealthier - The same study suggested baby bonds would greatly narrow, though not erase, the gap. Estimated federal cost of baby bonds: roughly $100 billion per year - Hamilton's estimate for a national program. Share of federal expenditures: about 2% - Contextualizes the budget size of baby bonds. Cost of existing asset-promoting tax breaks: over $600 billion per year - Prosperity Now estimate cited as a comparison point. Chance of U.S. adopting Acemoglu's election reform: probably one in five - Acemoglu concedes the political likelihood of changing the system is low.

Pivotal Quotes: "My big idea is at intersections, we should get rid of left turns. Ban left turns." — Vakash Gaia: Introduces his traffic-engineering proposal to improve safety and efficiency. "A baby bond is a trust account set up at birth." — Derek Hamilton: Defines his proposal for universal asset-building accounts for children. "The way to accomplish this, he says, would be to completely get rid of the majoritarian winner-takes-all election system and replace it with a different election system... Proportional representation." — Daron Acemoglu: Explains the core of his electoral reform proposal.

Implications: The episode highlights how system-level redesigns can outperform intuitive norms: fewer risky turns, universal wealth-starting capital, and fairer voting rules may improve safety, equity, and democracy if policymakers are willing to experiment.