That sounds like a big mistake. I can understand like, 48 km/h per hour in highly populated areas, but going below US school speed limits is going to create lots of offenders (maybe that's the end game). I can ride faster that 30 km/h on my bike. I can continually do that with as little as a 5% decline from the horizontal axis.
Loudly and visibly changing the rules doesn't "create offenders". Offenders aren't victims of changed rules.
It has been shown time and again that lowering speed limits in cities reduces traffic accidents and emissions at close to no costs to the flow of traffic.
My own city (in Germany, so it really was a heavily-criticized decision) lowered the speed limit on one of the major arterial roads to 30 kph. It is one I have to use regularly, and oh boy, let me tell you: I was soooo opposed to the change. Yet, it really only changed how fast you arrive at the next red light. There is literally no discernable change in how long it takes to pass that street, especially during rush hour. Traffic just got a little more fluid.
It is, however, the street with the most speeding tickets in town. I regularly see one or two mobile speed cameras along the way. And I've never been fined. You got to wonder...
I mean even if this speed limit was shit, it's not like speed limits in general are invisible and people don't know what happens if you break them. Every offense in this case is self-inflicted and not caused by the limit itself.
Streets in Europe are (with few exceptions) narrower than in the US. Is there a natural consequence for speed limits? Does it take some kind of special mental capacity to follow legal speed limits in streets that perceivably could be traversed faster?
Does it take some kind of special mental capacity to follow legal speed limits in streets that perceivably could be traversed faster?
In fact yes it does you practically need to be a superhuman: Narrow streets feel unsafe and drivers automatically slow down. In the US speed limits, where they don't build streets according to the intended speed but much wider, are set to lower than what the engineers want you to drive at because they expect speeding.
US speed limits are also inconsistent, and the signs announcing them are practically invisible. Have a video.
Typical walking speed is about 2.5 to 3 MPH suppose your government legislated a universal walking speed limit of 1.5 MPH. I think you can easily see that ridiculous laws create offenders, and the offenders are the victim of bad laws.
Wait school zone speed limits in the US is higher than 30km/h ?
In my country school zone speed limit is usually 20km/h and there are tons of residential areas as well as more and more cities that restricts big portion of their roads to 30km/h.
This is mostly done to reduce noise pollution as well as mortal accidents.
Most school zones in the US are 20mph (32km/h). Some states will have 25mph and, for example, a highway going through a school zone that usually 65mph may go to 35-50mph when the school zone is active but this is an exception, not the rule and is done on a case by case basis.
Remember though, American roads are much larger tha European roads. Most of these school zones that go that slow there's really no need for it.
Sometimes they are. Other times it's Main St. straight through the middle of town. And others it's through the middle of nowhere and peoples driveways straight onto it.
I've also seen dirt highways which just means it was an old highway from hundreds of years ago and just never got paved.
Also you are only allowed to drive as fast as to not endanger others. Children are not reliable and predictable. In front of a school during school hours driving at the speed limit is still reckless.
Parents need a way to drop off and pick up their kids, especially if it is a time other than school hours- the kid is sick, has a doctor's appointment, etc.
Are you seriously suggesting that it is worth wasting an ambulance and a team of EMTs' time when the problem could easily solved by the parent picking up the child and taking them to the doctor?
5% is pretty steep, I wouldn’t be surprised if one could reach 30 kph without pedaling at all.
Technically you can reach that with any amount of drop per distance where the speed gain exceeds drag as long as you don't specify how long the incline is.
Amsterdam isn't the kind of place where you'd be doing 30km/h. In car or on bike.
Amsterdam is one big highly populated area. See point 1.
If you do try going over 30km/h in Amsterdam, you're frankly a danger to yourself in most places on bike and a danger to pretty much everyone else when you're in a car.
Many major European cities already implemented this, and I've yet to hear of a single one where it turned out to be "a big mistake". Can anybody from these cities report (e. g. Helsinki or others)?
Madrid did this. Massive fail, basically no one was going 30km/h, if you did (which I used to, just to fuck around) you could expect lots of honking and comments about your mother. It was reverted shortly after
The limit before was 50km/h. The city is just too crowded. By lowering the speed limit even more you force people to take the highways if they want to reach the other side of the city.