Don't know about the break noise but I agree, rolling over a vehicle is nearly impossible, it almost always gets back on all 4 wheels.
A vehicle can flip over if another vehicle bumped into it hard enough to cause a flip and even that is not certain.

Yeah, this needs some tweaking.

This may have been done intentionally, as ArmA2 had tanks and other vehicles doing triple salto's in the air when driving over a small pebble on the ground. Rather have no flipping vehicles then how it was in A2 :>

Yep probability of "roll over" needs tweaking
Yes there is no horn
Yes there is far-too-much "skreetching" noise from tires

this issue is to help resolve car roll only, the car screech sound has been addressed on another log.

never tried rolling a vehicle so would'nt really know myself, but agree this needs addressing, as this is a war simulator, all vehicles should really act as true life physics.

Duplicate of #0000799.

Also, only post one bug report per ticket.