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A cul-de-sac ends among pads for new home construction left dormant in Rancho Cucamonga, California. Photo: David McNew/Getty Images.

The cul-de-sac has been a staple of urban development — and families' real estate wish lists — for the last 50 years. Now some cities are banning them from new developments.

Why it matters: Street-network sprawl determines a city's energy footprint.

  • Researchers have found that city and suburban streets have become less connected in ways that favor car travel over more climate-friendly options.
  • Grid-like streets are better for walking, cycling and public transportation, while cul-de-sacs, three-way-intersections and gated communities with "one-way-out" routes encourage vehicle use.

What's happening: City planners are encouraging denser street grids in new communities and redevelopments, or they could place a tax on three-way-intersections, or a "cul-de-tax," to change street design habits, researchers Christopher Barrington-Leigh and Adam Millard-Ball write in a recent study published in the Proceedings of the National Academy of Sciences.

  • In Denmark, bicycle and pedestrian paths are being integrated into communities to connect otherwise disconnected streets.
  • National planning guidance in the United Kingdom called for connected streets over dead-end designs.
  • After a 2001 earthquake in Bhuj, India, planners tried to interconnect all cul-de-sacs to avoid dead-end streets being blocked by fallen rubble.

Go deeper:

Go deeper

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Annelise Capossela/Axios

  1. Health: Fall and winter COVID surge "unlikely" if people get vaccinated.
  2. Politics: School boards are the next political battleground.
  3. Vaccines: Pfizer begins application for full FDA vaccine approval — Moderna says its COVID booster shot shows promise against variants.
  4. Economy: U.S. adds just 266,000 jobs in April, far below expectations.
  5. World: Asia faces massive new COVID surgeIndia records its deadliest day of the pandemic.
  6. Variant tracker: Where different strains are spreading.
Ina Fried, author of Login
2 hours ago - Technology

Exclusive: GLAAD finds top social media sites "categorically unsafe"

The leading social media sites — Facebook, Twitter, Instagram, TikTok and YouTube — are all "categorically unsafe" for LGBTQ people, according to a new study from GLAAD, the results of which were revealed Sunday on "Axios on HBO."

The big picture: GLAAD had planned to give each of the sites a grade as part of its inaugural social media index, but opted not to give individual grades this year after determining all the leading sites would receive a failing grade.

Shell CEO: You need us on climate change

Royal Dutch Shell CEO Ben van Beurden wants a seat at the table to fight climate change, and wants the public and policy makers to believe the oil and gas company is serious about shifting its massive business. 

Why it matters: The problem is, “in many parts of society, everything we say is wrong,” he tells “Axios on HBO.”

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