Towards the end of the video he addresses the point that the optimum speed of cars is around 60(or I thought it was 70).
This argument doesn’t apply here because that figure is for a car traveling at a constant speed on a straight, flat road with no wind. E.g. a freeway/motorway. In a city, a significant amount of the energy is used to speed up and slow down at intersections.
Remember the kinetic energy formula, Ek=1/2 mv^2 . That tells you that accelerating a car to twice the speed takes 4 times the energy, or in other words it takes 4 times as much fuel to get to 60 as it does to get to 30.
This extra energy to get up to speed is going to far outweigh any benefit from less rolling resistance at 60 compared to 30.
fwiw, Lemmy actually supports both subscript and superscript, though the syntax is a little weird if you’re used to Reddit. ~text~ is subscript, ^text^ is superscript. (Unfortunately support on mobile clients—even Jerboa, made by the official Lemmy devs—is rather lacking.)
Ek=1/2mv^2^
But yeah, that’s a really good point. I wonder how long you’d have to be travelling at 60 km/h to make that extra acceleration worth it in terms of fuel efficiency.
As a separate question: people would probably often be willing to sacrifice their fuel efficiency if it meant substantially shorter travel times. I wonder how much this would actually work. On highways it’s definitely going to be a huge factor, but on the sorts of inner-city stroads that are usually posted at 60 km/h, I suspect you’ll probably arrive at most of the same red lights accelerating up to 40 km/h as someone getting all the way up to 60 would. Would be an interesting experiment to conduct.
As someone who used Linux for years, then left due to issues with compatibility, and have recently returned; Linux distros have come a long way in ease of use for average/casual users like myself. I’ve been pleasantly surprised at how well everything just works. I’ve had to research a few things I wanted to do with my system, but those actions were going beyond the most common use cases. I don’t know if it is the “year of the Linux desktop,” but Linux is definitely in a place now that greatly increases its approchability. I know the community is very big on customization and tinkering, but that isn’t what the average pc user values, so having distros that are functional with zero or minimal tinkering will certainly be a boon to wider adoption. With apple being a “boutique” company and Microsofts continuous anticonsumer practices (my reason for switching), I definitely forsee a growth in Linux market share.
I think this will be the video I’ll recommend people unfamiliar with the channel from now on. Fun facts, introducing common problematic concepts, and relatively short.
Ah, that explains why the auto-suggested title didn’t work here when it did work in !nebula. My damn mouse has a habit of double-clicking when I use the button I have set to paste.
The only difference I see is instead of crossing a highspeed car lane, one would cross a slow speed cycling lane designed with the intent to protect individuals on bicycles.
The stock clip used at 3:20 involving a driver unabashedly on their phone is brilliant.
The 5:45 clip of a dude in a bigfoot costume cycling through Tokyo was unexpected.
6:00 the self-shout-out had me laugh out loud.
The idea of lowering local street speed limits not actually making your trip take much longer is so true. Brisbane-based cycling safety advocate Chris Cox has a video where he gives a demonstration. He drives the same route twice, once sticking to 30 km/h on the local streets, and once trying his best to get up to the speed limit of 50 km/h on those streets. (Driving to the predominantly 60 km/h speed limit on arterial roads.) The video on the whole is actually incredibly similar to this one, down to the safety/speed curve, the FOV comparisons, and the dismissal of the ridiculous arguments against 30 km/h. Because yeah, Jason’s words in the conclusion to this video are so right: the data is really, really, really clear here; at some point we have to realise that anybody fighting against lower speed limits within cities is either wilfully ignorant or they’re a selfish arsehole who values their convenience more than other people’s safety. But here’s a timestamped link to the bit of Chris’s video where he starts his experiment. It took a whopping 9 extra seconds. 9 seconds, on a 10 minute journey.
Alt text: They really shouldn’t let those small cars drive in traffic. I worry I’m going to kill someone if I hit one! They should have to drive on the sidewalk, safely out of the way.
It’s looking really cool! I also saw some horrible roads in some shots, but certainly looks like it’s moving in the right direction. Would love to visit some day.
It’s called Cheonggyecheon, 청계천. Google Maps in Korea is really, really poor (for legal reasons). The satellite quality doesn’t even come close to capturing this (you can barely even tell it’s there), and Street View is just from the road (as of 2018 at the most recent) where you can see that it’s there, but not get much of a sense of it. There are a very small number of those individual non-path Street View photos.
Look up “Doug Ford bike lanes” and you’re sure to find a ton. Ford has had it in for bike lanes with a rage usually saved for his non-paying drug customers.
So you don’t have taxis driving on sidewalks or motorcycles speeding down the wrong side of split avenues and you STILL have about the same road deaths and injuries per pop as Taiwan?
notjustbikes
Ważne
Magazyn ze zdalnego serwera może być niekompletny. Zobacz więcej na oryginalnej instancji.