You should limit PING to 150ms rather than speed, that action will reduce number of accidents more than speed limiter.
I myself and my friend we are long distance haulers and we drive 6000+ km custom routes pretty much all the time (my map is 100.00% explored) and whenever I can I will use max speed to complete my route faster.
You can go trough entire Italia on max speed as the roads are good and straight, also there is not many players in Italia DLC. Same applies to Viva la France DLC, good roads no players on sight, apart from frequent pay tolls.
Great Britain, Poland, Hungary, Slovakia and Czech republic are most of the time empty, you can go faster without causing accidents.
One of my custom routes
As you can see, from Brest to Stavanger 6206 km
Those players who are finding fun in simulation and prefer more simulation driving should go to EU1 and hang there with friends, no point for them to stay on the EU2. In fact the best simulation they will get by playing offline with bots.
For us who liked EU2 the way was it the fun is reduced a bit.
I can handle bad drivers, inexperience drivers, laggers, kids, cars, trolls, over speeding drivers with ease.
There are Quick Save and Autosave features, if I ever get in to situation that someone crashed into my truck, I will calmly load save point 5km before with 0% damaged cargo.
If I see that someone is stuck on the road or rolled over or in any way making road blocked, I will approach to him then make a quick save, then do a quick load, spawn in ghost mode which will allow me to go through him and past blockade.
Drivers should be aware of this.
Personally I have never raged when someone crashed into me.
If you want to reduce accidents then:
1. limit ping and remove laggers
2. limit speed of the cars or remove their ability to tip over a truck with a 60 tons locomotive on the trailer, trolls love that stuff.
3. Control more Wild West C-D zone.
Honestly I think C-D zone is the zone with most accidents while rest of the continent is empty and accidents free, many people are making money from C-D zone by creating YouTube clips or streaming to Twitch so in my eyes it is perfectly normal to have most of the accidents right there.