This display is an "Exit Now" location for reaching westbound I-270 motorists to exit for McDonnell Douglas Blvd. This is located on the west side of the Boeing facilities. Exits to the west include I-370, St. Charles Rock Road and I-70. “Size. No billboard panel shall exceed six hundred seventy-two (672) square feet or forty-eight (48) feet in length and fourteen (14) feet in height. The maximum size limitation shall apply separately to each side of a sign structure. The signs may be double-faced or V-type construction with not more than one (1) display on each facing with each such sign structure being considered as one (1) sign.”