escaping Traditions of Trade

how do you get past the baracades to get to the escape car? i have completed all aspects of mission...

[Bob_hoesmith]

Get a guard disguise (off the guy in the locked up ghost/weird/murder section) head to the third floor on the right hand side and go to the security room. Turn off the metal detectors. I usualy do this first: drop guns, run in, off metal detectors, run out, grab guns, kill targets, escape with silent assasin.