Just as important as junction design is driver education. In the Netherlands they focus very hard on driving safely with respect to cyclists. A big part of that is indeed roundabouts. An average driving course will make you practice driving safely on different types of roundabouts many many times, and the main focus is on avoiding accidents with cyclists. This is important because on most roundabouts the cyclists do have priority when they are going around the roundabout over a car who is leaving or entering the roundabout, and cyclists will take that priority without a second thought because they know that the driver will stop as he/she should.
This also means that it can be hard to pass a driving exam for foreigners who already have a drivers license in their home country. I know several people who have failed the exam multiple times despite driving for years in their home country.
Rather off topic, but have you already considered that the obligation of a driver's license is against the hacker ethics and thus hackers should campaign for an abolition of driver's licenses?
"Access to computers—and anything which might teach you something about the way the world works—should be unlimited and total. Always yield to the Hands-On Imperative!"
"We don't have cars anymore, we have computers we ride in; we don't have airplanes anymore, we have flying Solaris boxes with a big
bucketful of SCADA controllers [laughter]; a 3D printer is not a device, it's a peripheral, and it only works connected to a computer; a radio is no longer a crystal, it's a general-purpose computer with a fast ADC and a fast DAC and some software."
this rule should also apply to cars. Also for point 3 of Levy's hacker ethics
"Mistrust authority—promote decentralization"
it is clear how an mandatory driver's licenses violates it, since there is a central authority which allows/disallows driving.
To state one thing clear: If you want to drive a vehicle, I strongly recommend taking some driving lessons. But making a driver's license madatory is a clear violation of the hacker ethics and any hacker or supporter of the hacking scene should make in no uncertain manner clear that they espouse an abolition of mandatory driver's licenses.
You're arguing against trusting authority while insisting we all should do exactly what Steven Levy tells us to do.
Also, a drivers' license doesn't deny one access to a car, nor does it deny one the ability to drive (except perhaps legally.) So I fail to see how requiring a license to drive limits a hackers' access to the computer in a car in any meaningful way.
You could just as well argue we should all steal anything with a chip in it because stores are limiting access to electronic goods by requiring people to pay for them. Or that every network in existence which employs any privileged access (passwords, sudo, etc) violates that ethic because by definition, they're denying someone access to some part of the code.
The hacker ethic is fine and all, but like anything, once you take it too far it just becomes another form of fascism.
This also means that it can be hard to pass a driving exam for foreigners who already have a drivers license in their home country. I know several people who have failed the exam multiple times despite driving for years in their home country.