thank you for the welcomes and great site. first off, i think i have the lastest patche and mod. i have 1.1.638.0 patch and using the NAM 09.04B.04 beta. i started new game built a straight elevated highway and place a toll booth on the middle of the highway. then i would choose the perpendicular or the parallel single sided ramp and hover over the toll booth a couple of time. then the game would freeze and close and then im back to viewing my desktop. i hope this explanation is more clear than last.