Park N Ride near exit 140 on route 311
Got stopped at the roadblock last night, Black Friday 2011. It was around 9pm and ended around 9:30 as soon as the officers were done with what they were doing. So it was probably set up a little while before. Also I have heard about this road block being set up on 311 near hanging rock on weekends usually anytime to random times when they want to do it.