Next comes the expensive things: Replace the car fleet with large, safe and modern cars. Build infrastructure like pedestrian walkways etc to have few unprotected people in traffic. Replace crossings with roundabouts and rebuild motorways and other high speed roads to never have oncoming traffic (separating railings etc). Have extensive automated speed monitoring, including average-speed monitoring, i.e. multiple speed cameras that time the passage of cars over some distance such as through a tunnel.
SUVs are not only notorious for their awful gas mileage but also how unsafe they can be for the pedestrian or other car they hit if they do.
Not necessarily for the other cards on the road, or pedestrians.
From what I was told this is how it works:
Prosecutors are bribed to make intentional mistakes so that a judge will dismiss a case (called in Romanian "viciu de procedura", roughly translated to "procedural defect").
Judges themselves are bribed usually in high profile cases, and because of the many legal loopholes it is difficult to prove they are corrupt. Laws can often be interpreted two ways, and it's not uncommon that two lower courts give radically different sentences compared to higher courts.
I heard of cases where doctors are bribed so that a sudden serious health issue is discovered so the perpetrator doesn't get to serve time. Specifically related to traffic offences a high profile political figure recently killed two people, and although the guy was initially able to walk on his own, two days later, the individual was shown on a hospital bed unable to move. The media suspects both doctors and the judge will be influenced, because in Romania by law a judge has to establish what is the percentage of fault each party has. The guy was on the phone when he killed a car driving opposite lane, but since he has been injured "seriously" then the victim is also being blamed for ...injuring the perpetrator. Since he was hospitalized it's easier for a judge to say the victim had X% of fault and thus give a more lenient sentence.
Someone I know working for the economic police told me that they are told exactly whom not to verify, because they are known to do tax avoidance, but they "create jobs" (everything has an excuse) so they are to be left alone.
Basically, there are so many wholes in the system that one doesn't need to bribe the foot soldier, they can just bribe on part of the system and they will get away with it. Applies to traffic offences, financial crime and everything else.
Don't get me started to the amount of fraud that happens with EU funding in Romania as that's also ripe with creative ways to rig the system.
What I find very strange is that people really don't like talking about such issues, saying one should not bad mouth their own country, or when the EU raises such issues they raise the "non interference in internal affairs card". If the foreign media raises it then it's racism. There is a small number of people still opposing this, but recently the police has without shame started beating or harassing them. I see no change in sight because the culture itself is predominantly in favor of letting things work as they do.
In cities it's different, there even a 10 km/h reduction makes a big difference for safety on intersections and with bikes/pedestrians.
It is mostly driving culture, I noticed in Romania people have to get quick everywhere because of "reasons". They have a car so they feel important. Like "out of the way pesants on foot". There was a lot of bad roads, and romanian people I was working with, mostly complained about roads being shitty. (Taxi drivers driving like Formula 1 drivers, good that we did not crashed into anything)
That said, Poland would be somewhere in between Romania and Netherlands (not sure about stats) but in my impression of driving culture. There is still a lot of people who think "I have a car, I am important, I have to be quick everywhere because of reasons". Infrastructure was bad in Poland as well (last years we got a lot of better roads, so I am happy about that and hope Romania gets their infra a lot better also, or have it built now).
In the Netherlands, no one gives a fuck if you have a car, you are not important just because you drive. Everyone basically can afford a car (not being communistic country, everyone having a car would be quite normal since 80's, I bet Norway also had a lot more people driving since 80's than in PL or Romania) so by any means having a car is not a status symbol (unless it is new Porsche or Tesla). Fines are insanely expensive (at least from what I read it is also the case in Norway).
So basically two things as my take away for this: drivers thinking they are more important, shitty infrastructure.
Better roads & infrastructure (which lead to less car use and slower traffic), driver education, enforcing traffic laws do help though.