Interesting, because in some places like the UK, road infrastructure is intentionally made "difficult" as it has been proven to make drivers pay more attention and reduce accidents around those places.
These are different types of changes like lane narrowing or lane marker omitting that don't aim to make driving less intuitive, but to decrease the perceived safe speed of travel. They're trying to make driving feel more difficult without actually increasing the danger level, which in theory decreases the danger for everyone else on the road without actually endangering drivers.
This happens in Norway too. For instance lots of zebra crossings were scraped away where I live a few years back, because they argued (from accident statistics) it gave pedestrians a false sense of security.
That may be, but it also made 95% of drivers (those obeying traffic regulations) actually stop for you to cross. Obviously they don't if there's no crossing, and you have to wait ten times as long to cross safely.
Do you have a reference for that, out of interest?
That might genuinely be the intention but I'd worry that -- depending on the kind of 'challenge' added to roads -- it might not always work out for the best.
I know this approach is used in residential areas in the Netherlands. A lot of these streets are designated as "woonerf" (https://en.wikipedia.org/wiki/Living_street), which means that everything has right of way on cars (i.e. pedestrians, bikes, playing kids, whatever).
The design is often (intentionally) tricky to navigate. Brick/cobble roads to make driving fast uncomfortable. Planter's narrowing/blocking half the road, resulting in the road frequently being limited to a single lane (often alternating sides) so cars can't simultaneously pass. Frequent 90 degree turns, that sorta thing. It make it impossible to drive fast on these roads.
Note that this is only applied in some "zones", generally this applies to streets with houses, which will then connect up to a 30 km/h max road that is less obstructed and functions as a connecting artery to main roads in the city/town and eventually provincial roads (80 km/h) or highways.
Each classification has different goals, so highways and provincial roads are "vehicles only", cyclists and pedestrians will be on completely separate unconnected paths (usually with several meters of separation from the main road).
Main roads will have both cars and cyclists, but usually separate/designated bike lanes (and sometimes even separated bike paths). Only the 30km/h and woonerf streets really have bikes and cars mixed on the same lane (and will have measures that restrict car speed like I mentioned above).
The keyword to look up is ”traffic calming”. Making lanes narrower, adding curb extensions (bulbouts), gentle curves to otherwise straight roadways, and so on.
That's certainly not unique, though the amount of effort put into it will vary. In Germany a typical response to an accident hotspot might be putting up extra signage (e.g. no passing, lower speed limit, Difficult Curves Ahead), adding or moving/changing a traffic light, speedbumps, speed checks etc.
Major, expensive stuff like changing the routing or curvature is pretty rare and most likely to happen if the road is reworked anyway.
It is a legitimate reason to change the curvature or build a bridge or additional exit in Norway "because it's difficult to drive in".
It's really quite incredible, and combine that with safer cars, and you can really start to eat into traffic fatalities.