Wirelessly posted (iPhone: Mozilla/5.0 (iPad; U; CPU OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5)

BHM is clear at both checkpoints (the WN one has construction though to "modernize" it, or so they say).

MDW has one, at the far right of the main checkpoint area. Stay left, or go down the right and head in to the "other" areas behind the wall.

STL E terminal has one in the middle lane. Easy to self select the other lanes. The elite line takes you to a WTMD lane.