David Zipper Profile picture
Nov 6, 2021 10 tweets 4 min read Read on X
The newly-passed infrastructure bill could bring major - and very positive - changes to auto safety.

Example: The bill requires that autos be equipped with tech to detect when the driver is drunk (and prevent them from driving). The alcohol industry fought this hard.

[cont'd]
The bill also pushes USDOT to (finally!) update the New Car Assessment Program (crash test dummy program), to evaluate the risk that car models pose to pedestrians and cyclists -- who are currently completely ignored.
Minimum performance standards for Advanced Driving Assistance Systems, addressing the wide (and confusing) disparities in what these systems can do right now.
And something that should worry Tesla:

An explicit focus on driver monitoring systems, including examination of "foreseeable misuse" of ADAS systems (ahem, Autopilot).
For context, this article explains how passive alcohol detection systems work. Also some stuff here about driver monitoring systems.

I wrote it a year ago, and frankly I'm stunned to see this much progress on auto safety tech in a single bill.
bloomberg.com/news/features/…
And here's more info about the NCAP program, which -as Congressional Dems recognize - is in dire need of an overhaul.
bloomberg.com/news/articles/…
More good stuff for cyclists and pedestrians:

The infrastructure bill instructs USDOT to conduct research "focused on incorporating bicyclists and other vulnerable road users into the safe deployment of connected vehicle systems."
To be more specific, the American Beverage Institute lobbied hard against the infra bill's alcohol detection provision.

Also, much of the auto industry wanted this tech to be optional instead of mandatory on new cars, which would've defeated its purpose.
Strange but true:

The infra bill instructs USDOT to add pedestrian and cyclist safety to NCAP crash ratings.

Meanwhile, Build Back Better would incentivize heavy, tall e-trucks and SUVs ($80k cap for a $12.5k rebate) over safer sedans ($55k cap).
Just noticed this: The infrastructure bill instructs USDOT to update federal crash data to identify people who were riding a bicycle or scooter.

That change could dramatically improve info available about streets and roads that are most dangerous for vulnerable road users.

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More from @DavidZipper

Apr 28
Oversized SUVs and trucks worsen a slew of societal problems, including crash deaths, climate change, and tire pollution.

But rather than restrain car bloat, federal policy has actively encouraged it.

In @voxdotcom I explained how. 🧵

vox.com/future-perfect…
Image
First, a bit of context.

US cars have grown enormous. SUVs and trucks comprise 80%+ of new vehicles, up from ~25% in the 1970s.

SUVs and trucks steadily gain pounds and inches as models are refreshed.

jalopnik.com/trucks-and-suv…
Image
Car bloat -- the needless expansion of vehicles -- is a societal disaster (see the 🧵 below).

Problems include:
🔹 More road deaths
🔹 Increased air/tire pollution
🔹 Faster road wear
🔹 Pricier cars

Read 14 tweets
Apr 19
This @FT piece is the best examination of US crash deaths that I've seen in ages.

The US is so bad at this: "Even after adjusting for distance driven, US fatality rates remain 2x the rich-world average."

Here's a quick 🧵 to share insights (paywall).

ft.com/content/9c936d…
Image
Note that the US pedestrian safety crisis revolves around a few exceptionally dangerous states (looking at you, Texas and Florida).

Many relatively safe states (like those in New England) are on par with other rich countries. The Southeast and West are not. Image
The rise of SUVs and trucks has definitely made American streets more deadly, but that's only part of the story.

Car bloat is awful -- I'm not sure anyone has criticized it more than me -- but other factors are clearly at play. Image
Read 7 tweets
Mar 30
Fifty years ago, William Whyte studied how New Yorkers schmoozed, sat, and relaxed the small open spaces available to them. This 1980 treasure was the result.

Join me as I share a few timeless lessons. 🧵 Image
A key urbanist insight: “Supply creates demand.”

Comfortable urban spaces attract people happy to find a place to chat, eat, or read.

It's also the core idea behind induced demand, which explains why highway widening is futile (and why good bike lanes create more riders). Image
Whyte and his team meticulously gathered data about how people used plazas, sidewalks, and ledges, sharing metrics about everything from the optimal bench depth to the natural distribution of people sitting.

Here’s a table of people using the Seagram Building's plaza. Image
Read 13 tweets
Dec 18, 2023
Oversized SUVs and trucks kill people in crashes, catalyze climate change, and widen inequality. And the problem is getting worse.

A 🧵 about my deep dive on car bloat, in @Slate Image
@Slate “Car bloat” describes the shift in new car sales toward increasingly massive SUVs and trucks.

In 1977, SUVs and trucks comprised 23% of US car sales. Now they are over 80% -- and individual models keep adding weight and height. Image
@Slate The SUV trend began in the 1970s, when the American Motors Corp repositioned the military Jeep for the mass market.

AMC hyped features like 4-wheel drive that were largely useless in the suburbs, but its pitch worked. The Jeep was a hit, and other carmakers followed suit. Image
Read 16 tweets
Nov 19, 2023
Today is World Day of Remembrance for Road Traffic Victims. #WDoR2023

Notably, Americans are 2-5x more likely to die in a crash than those in peer nations. And the gap is widening.

Here are a few often overlooked ways to reduce the carnage. 🧵

nytimes.com/2022/11/27/ups…
Image
1) Invest in mass transit

Buses and trains are 30-66x safer per passenger mile than driving.

Places with strong transit systems have more transit trips and less driving. They therefore have fewer crash deaths.

slate.com/business/2022/…
Image
2) Build better sidewalks

US pedestrian deaths are at a 40-year high.

Complete sidewalk networks – with ample traffic islands, curb extensions, and crosswalks – can protect those on foot.

bloomberg.com/news/articles/…
Image
Read 9 tweets
Nov 18, 2023
Last week the National Transportation Safety Board recommended that speed-limiting technology be required on all new cars.

It’s an excellent idea. @USDOT should do it.

My latest in @FastCompany. 🧵 below

fastcompany.com/90985257/you-s…
Image
Consider this horrific crash last year in North Las Vegas.

A man on cocaine and PCP drove his Challenger at 103 mph through a red light, smashed into a van, and killed himself and eight people.

Speed-regulating tech could’ve prevented it.

cnn.com/2022/01/30/us/…
Image
Speeding is very, very dangerous.

It's involved in 12k+ crash deaths per year in the US, around 1/3 of all fatalities. Many involve truly reckless speeding, with drivers going 20+ mph over the limit.

. nhtsa.gov/press-releases…
Image
Read 11 tweets

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