 The tunnel was designed by Oliver Fowlkes and construction directed by Wayne Palmer of Mobile.Only passenger cars and pickup trucks are still allowed to travel through the tunnel, as it is very narrow.Large trucks and hazardous cargo are routed (on U.S. 90/Truck U.S. 98) over the Cochrane–Africatown USA Bridge miles to the north or the George Wallace Tunnel on Interstate 10 a few blocks to the south.