David Zipper March 26, 2024 Slate, 2024 What Will Happen to Traffic in the Wake of the Baltimore Bridge Collapse? David Zipper March 26, 2024 Slate, 2024 Believe it or not, congestion probably won’t worsen while Baltimore’s Key Bridge is repaired
David Zipper March 19, 2024 2024, Slate TikTok Is Taking a Page From the Uber Playbook David Zipper March 19, 2024 2024, Slate How Uber inspired TikTok’s lobbying strategy.
David Zipper March 1, 2024 Vox, 2024 Driving at ridiculous speeds should be physically impossible David Zipper March 1, 2024 Vox, 2024 Tbe movement to adopt Intelligent Speed Assist is growing
David Zipper February 28, 2024 CityLab, 2024 What E-Bike Rebates Can (and Can’t) Do David Zipper February 28, 2024 CityLab, 2024 A new study explores the power and limits of e-bike rebates, offering tips to maximize their effectiveness
David Zipper February 8, 2024 2024, CityLab For Cities, ‘Transit Is Existential’ David Zipper February 8, 2024 2024, CityLab I spoke with Jarrett Walker about how transit agencies can survive the myriad challenges they now face.
David Zipper February 6, 2024 2024, Slate A 7,000-Pound Car Smashed Through a Guardrail. That’s Bad News for All of Us. David Zipper February 6, 2024 2024, Slate Huge cars will destroy guardrails, leaving taxpayers to pay for expensive upgrades.
David Zipper February 5, 2024 2024, CityLab Inside California’s Coming Fight Over Vehicle Speed Limiters David Zipper February 5, 2024 2024, CityLab Could California really be the first US state to require speed governors on new cars? State Sen. Scott Wiener thinks so.
David Zipper January 24, 2024 CityLab, 2024 The Town That Took Downtown Renewal to the Next Level David Zipper January 24, 2024 CityLab, 2024 Morristown, TN built elevated sidewalks through its downtown — but lifting pedestrians above traffic has been a mixed blessing.
David Zipper January 23, 2024 2024, Slate Funny Safety Signs Have No Place on Highways David Zipper January 23, 2024 2024, Slate Highway safety puns don’t reduce crashes. The feds are right to discourage them.
David Zipper January 5, 2024 2024, Fast Company E-scooter companies are going bankrupt. That should alarm you even if you hate them David Zipper January 5, 2024 2024, Fast Company We should be rooting for e-scooter companies, not gloating over their struggles
David Zipper December 19, 2023 2023, CityLab On-Demand Microtransit Can’t Escape This Big Problem David Zipper December 19, 2023 2023, CityLab Door-to-door, on-demand transit is great — but it cannot scale.
David Zipper December 18, 2023 2023, Slate Why Is Your Car So Big? David Zipper December 18, 2023 2023, Slate American cars keep growing bigger and heavier — triggering a cascade of problems
David Zipper December 14, 2023 2023, Slate We’re About to Find Out How Dangerous the Cybertruck Really Is David Zipper December 14, 2023 2023, Slate The Cybertruck is recklessly designed — but the feds are powerless to prevent its launch
David Zipper December 7, 2023 2023, Fast Company Why 2023 was the year of the e-bike and not the self-driving car David Zipper December 7, 2023 2023, Fast Company 2023 was a very good year for e-bikes. For AVs…not so much.
David Zipper December 5, 2023 Slate, 2023 Important People Are Noticing How Terrible CLEAR Is for Airports David Zipper December 5, 2023 Slate, 2023 Congress is starting to realize how awful CLEAR is for flying — and for society
David Zipper November 30, 2023 2023, Other America’s public transit doesn’t have to be this way. It can learn lessons from abroad David Zipper November 30, 2023 2023, Other For the World Economic Forum, I offered a few lessons US transit agencies can learn from abroad
David Zipper November 18, 2023 Fast Company, 2023 You shouldn’t be driving over 100 mph—and your car shouldn’t let you David Zipper November 18, 2023 Fast Company, 2023 The NTSB now recommends that the US require speed-limiting tech on all new cars. It’s a great idea.
David Zipper November 15, 2023 2023, The Verge Uber failed to help cities go green — will robotaxis, too? David Zipper November 15, 2023 2023, The Verge Like ridehail, robotaxis are more likely to damage the environment than repair it.
David Zipper November 14, 2023 2023, CityLab How Cars Transformed Criminal Justice in the US David Zipper November 14, 2023 2023, CityLab I spoke with author and professor Spencer Headworth about how cars have upended law enforcement.
David Zipper November 9, 2023 2023, Slate There's a Big Problem With Your Car's Tires David Zipper November 9, 2023 2023, Slate For the first time, the federal government is investigating the dangers of tire pollution
