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awjustus.bsky.social
@awjustus.bsky.social
Thus always to tyrants
November 5, 2025 at 1:44 AM
3/ With lower weight materials, acoustic insulation needs to be added to mitigate noise transfer between spaces. This involves a fiber or rubber barrier with a gypsum or Portland cement leveling compound on top before the finished floor.
October 9, 2025 at 4:21 PM
1/ Learning lots about mass timber and prefab construction in a mass timber building in SE DC. The pavilion’s open design provides nice views of the air traffic out of joint base Andrews (c-5 galaxy transport aircraft pictured).
October 9, 2025 at 4:21 PM
“For every five people leaving the trades we only have 1-2 entering,” we need more career and technical education, we need more legal immigration.
- ND Gov Armstrong at #yimbytown
September 15, 2025 at 1:47 PM
With surface reauth coming up, policy makers could stand to learn from countries that consider public health benefits of walkable transpo projects.

www.niskanencenter.org/housing-heal...
September 2, 2025 at 1:48 AM
6/ In the minivan segment, this means buyers have been slow to realize the Chrysler offerings are subpar compared to the competition. The Pacifica minivan, riding on four decades of buyer inertia since Chrysler invented the segment, only recently lost the sales crown to Toyota.
August 5, 2025 at 3:02 PM
4/ Impressions from rental or loaner vehicles can stick with the motorist, especially if the vehicle has an obvious flaw or feels unsafe to operate.
August 5, 2025 at 3:02 PM
3/ Consumers also have opportunities to benchmark vehicles they receive as rental cars or on loan from a mechanic while a primary vehicle is being serviced. These encounters form valuable impressions outside a pressurized sales environment.
August 5, 2025 at 3:02 PM
2/ Most consumers compare new vehicles to ones they have had in the past. These points of reference often compare between brands, and sometimes across vehicle segments like Luca's touchstone, a 2017 Subaru Impreza.
August 5, 2025 at 3:02 PM
1/ The latest from Factory Seconds,
@lucagattonicelli.bsky.social
drives multiple minivans and discovers that all new cars are not, in fact, good. Most motorists only have chance encounters with unfamiliar vehicles, so many operate with imperfect information when comparing different ones.
August 5, 2025 at 3:02 PM
6/ Returning to the first piece, current headlight regulations have not kept pace with the attributes of modern headlights. Rules have changed relatively little despite rapid changes in lighting technology, it is time for that to change.
July 29, 2025 at 1:07 PM
5/ In recent decades, technology has made headlights brighter than ever, but increases in output do not always translate to increased lighting performance.
July 29, 2025 at 1:07 PM
4/ With limited adjustments, the sealed beam design continued until the mid 1980s, when federal regulators allowed modern replaceable-bulb headlights for the first time.
July 29, 2025 at 1:07 PM
3/ A consortium of state regulators eventually mandated a single headlight design using a new design that permanently bonds the headlight filament into the reflector housing, guaranteeing all cars complied with glare and performance standards.
July 29, 2025 at 1:07 PM
2/ Not long after the first electric headlights, regulators sought to mitigate glare. With inconsistent results.
July 29, 2025 at 1:07 PM
1/ Last week I explored current car headlight rules, tech, and how they perform. This week we look at how headlights developed alongside the automobile to bring us where we are today.
July 29, 2025 at 1:07 PM
10/ Luminance, colloquially known as brightness, has a place in these reforms as well. Rather than limit total light output, smarter regulations would target output intensity across the headlight surface area.
July 20, 2025 at 3:44 PM
9/ Fixing light color is a promising reform with few tradeoffs. There is no technical benefit from bluer light, only costs in terms of glare and eye fatigue.
July 20, 2025 at 3:44 PM
8/ Mitigating aim-related glare starts with guaranteeing every new car leaves the factory with properly aimed headlights (not currently required). Other measures, like allowing US cars to run global-standard adaptive beam lights would both improve visibility and reduce glare.
July 20, 2025 at 3:44 PM
7/ What can we do? According to Daniel Stern, an automotive lighting engineer and editor of Driving Vision News, the leading trade publication for vehicle lighting and active safety systems, a three-point plan to tackle aim, light color, and luminance is a good starting point.
July 20, 2025 at 3:44 PM
6/ Light color is poorly understood. Many drivers think bluer light improves visibility at night. But this is not true. Bluer light is shown to be more dazzling for other motorists for equivalent brightness. It also contributes to nearsightedness and eye fatigue.
July 20, 2025 at 3:44 PM
5/ Additional research shows improperly aimed headlights (or headlights misaimed due to vehicle movement or load) have an even bigger impact than headlamp height. Test drivers exhibited 25% worse seeing distance when confronted by oncoming headlights misaimed by only 1.5 degrees.
July 20, 2025 at 3:44 PM
4/ Research shows vehicle height mismatch contributes to worse reaction times for the driver of a shorter vehicle when confronted with headlights from a taller vehicle in their sight line.
July 20, 2025 at 3:44 PM
3/ In addition to brightness, measured as luminance in engineering terms, factors like vehicle height, headlight aim, and light colors play a significant role in how we perceive glare. Here we can see how higher headlights are at eye level for the older vehicle's driver.
July 20, 2025 at 3:44 PM
2/ Vehicle lighting is a complex system, with tradeoffs between casting light to help driver see but restraints intended to mitigate dazzling glare that impairs other road users. Current lighting regulations are grounded in rules from 1968, when headlights were far dimmer.
July 20, 2025 at 3:44 PM