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David Zipper Profile
David Zipper

@DavidZipper

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Senior Fellow @MIT Mobility Initiative + Contributing Writer at Vox, focused on transport. Words in @Slate @TheAtlantic @CityLab https://t.co/QE33pKTUuw

Washington, DC
Joined March 2011
Don't wanna be here? Send us removal request.
@DavidZipper
David Zipper
2 years
Hey folks, I'm going to spend less time here and more on other platforms. To keep in touch:.Bluesky: @davidzipper.bsky.social.Linkedin: Mastodon: @davidzipper@mastodon.social. Paved with Good Intentions, my free newsletter:
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@DavidZipper
David Zipper
7 months
FYI, I'm not posting here anymore. To follow my articles/musings, follow me on Bsky (same handle) or sign up for my free newsletter, Paved with Good Intentions:
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@DavidZipper
David Zipper
8 months
Which #s do carmakers use to market EVs? . My conclusion, in @FastCompany: . “Rather than auguring a future of useful & efficient EVs, automakers are emphasizing metrics that portend disappointed customers, wasted resources, & needless road deaths.”.
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@DavidZipper
David Zipper
8 months
In US cities, ~2/3 of crash deaths occur on streets owned by the state – not local gov. Outdated, deadly state roads are preventing cities from building the safe, comfortable, and transit-friendly streets residents want. My deep dive, in @voxdotcom .
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@DavidZipper
David Zipper
8 months
My latest story in Bloomberg CityLab: An interview with @BethOsborneT4A exploring what Trump's election means for US transportation policy. I have a thread with much more info on Blue Sky. Find me there: @davidzipper.bsky.social.
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@DavidZipper
David Zipper
8 months
I’m @davidzipper.bsky.social if you’re so inclined. Will be spending more time there, and less here.
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@DavidZipper
David Zipper
8 months
If you’re not already on Bsky, please join. Many great people are there—and many not-so-great people are not.
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@DavidZipper
David Zipper
8 months
Everyone is being so nice to each other in DC today, like the other person is about to undergo an excruciating and risky operation.
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@DavidZipper
David Zipper
8 months
Cities and states must lead. Here are a few possible strategies.
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@DavidZipper
David Zipper
8 months
A Trump presidency means the feds won't be restraining car bloat. This NHTSA proposal looks doomed. The path for reform now goes through states and cities, where officials can impose fees on the heaviest cars, outlaw truck lifts, and give smaller cars preferential parking.
@DavidZipper
David Zipper
9 months
Finally, the Biden administration is taking a stand against car bloat. @NHTSAgov has proposed banning SUV & pickup hood designs that are especially likely to cause head injuries. In @FastCompany, I explained why this could be a watershed moment. 🧵.
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@DavidZipper
David Zipper
8 months
Impact of congestion pricing in Stockholm:. - Car traffic ⬇️ 20%.- Center city air pollution ⬇️ 10-15%. "Congestion pricing isn't even a controversial subject anymore; it's more akin to talking about speed limits or traffic signals.".
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@DavidZipper
David Zipper
8 months
"An e-bike won’t make sense for everyone. But, for those looking for a new way around town or to save on the high cost of owning a car, it could be a game changer. For me, it might be what makes me sell the Chevy.".
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@DavidZipper
David Zipper
8 months
Researchers: "Car-centric neighborhoods really are boring.".
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@DavidZipper
David Zipper
8 months
As of today, Paris has banned thru-traffic in the center of the city. Cars owned by central zone residents/workers/visitors are still OK -- but no thru-traffic. Motor vehicle counts are expected to decline up to 30%.
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@DavidZipper
David Zipper
8 months
Many Vision Zero cities/states in the US now have more crash deaths than before they "committed" to VZ. VZ is a policy structure built around the idea that humans make mistakes, and they shouldn't be fatal. But in the US, it's often just a talking point.
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@DavidZipper
David Zipper
8 months
Warsaw is the latest European city to reach a new low in crash deaths. Vision Zero consistently works in Europe, but not in the US. Key reason: American officials resist doing the hard work of redesigning streets and slowing down cars.
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@DavidZipper
David Zipper
8 months
Research I'd like to see: . A study exploring how much of drivers' antipathy toward bike lanes is due to jealousy that cyclists don't get stuck in congestion.
@DavidZipper
David Zipper
8 months
The research says, "No, they do not.".
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@DavidZipper
David Zipper
8 months
The research says, "No, they do not.".
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@DavidZipper
David Zipper
8 months
Lessons for other cities from Denver’s e-bike rebates:.- Expect *massive* demand at launch.- Use drawings, rather than first-come,-first-served.- Treat bike retailers as close partners.- Get ready to see a lot more people demanding bike lanes.
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@DavidZipper
David Zipper
8 months
Despite the popularity of Denver’s e-bike rebate, its days may be numbered. The reason: Colorado now provides a basic $450 rebate -- more than Denver – and the two discounts aren’t “stackable.” The city may reallocate voucher $ to other programs.
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@DavidZipper
David Zipper
8 months
Still, not everything about the program is ideal. Denver officials dislike the scrum to snag a voucher at a specific time. They worry it's inequitable, excluding those who can’t get online. They’d prefer to hold issue vouchers through regular drawings.
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