It has been confirmed that my .nfsms file works, so enjoy this mod with yours
Look for it in the second comment or download from here: 
After some time figuring it out, I finally have added, not replaced, almost all traffic vehicles this game has, including all the hidden cars, vans and trucks. They don't spawn all together, it appears that the game selects a few at random when it starts and then these spawn repeatedly. In fact, the only traffic vehicles which won't spawn at all with this mod are the traffic caravan and the truck with pipes (semicmt), I will explain why later.
This means that the big trucks with trailers from NFS Carbon and Most Wanted are back.
They were already coded in the game, but I had to fix their chassis values among other modifications, as they bounced like crazy and trailers didn't attach to the trucks. I've mostly followed what 379Felipe did with his NFS Carbon Tuning Mod V2.1 to fix the trucks in that game, so BIG thanks to him and his mod. Now the trucks won't act crazy most of the time (only when doing sharp and quick turns, I'm sure this can be fixed completely with more research) .
As I said before, the caravan and the truck with pipes are not added due to two reasons. One is that the caravan has no collision, so I just decided not to add it to the traffic. The other reason is that I don't know how to fix the famous glitch of this container with pipes. The thing is that it has been shown by 379Felipe that it can be fixed in NFS Carbon, and it was also shown in an old mod made for NFS Most Wanted some years ago, so if someone else knows how to fix it, please tell me or feel free to fix it. I put the Infiniti G35 as a "placeholder".
I've also disabled the values that made the trucks inmune to crashes, so feel free to use the juggernaut powerup to wreak havoc in races hehehe
. I've also made all traffic vehicles a little bit heavier in general. The rest of the game is completely untouched.Without further adoo, here are some photos of some of the new vehicles:
So that's it, feel free to upgrade and/or to modify the mod they way you want, as long as you are responsible and make backups of your files in case something breaks. If you want the .nfsms file, use it with your mods, as it has been reported that works fine
