an artic driver stoped short of the railway bridge at the station in portlaoise, realised he couldnt take a right at the heritage hotel as its one way, and he couldnt reverse as the traffic wouldnt permit it. i was amazed when he fiddled the cab and the rear tractor suspension dropped. then he did the same to the trailer, and off he went - never knew truck suspensions could be altered for height! ... another learning day!