Perhaps this problem does not need to be corrected at all, I remember in Arma2 there was a bad connection icon, so why not return it to dayz, this will eliminate a lot of problems that players report, since they will know that the reason is a poor connection and look for a problem on its side or choose servers with lower ping.
Jun 5 2019
you need to ping to server on which you play when your car starts jumping to test this hypothesis.
Jun 4 2019
I noticed that this happens because of high sudden ping problems or loss of network packets from player and i watched this in server control panel. This happens when a person with a bad ping is sitting in the car, even if he is not a driver.