No one can adequately explain the day-long, perpetual traffic jam on the westbound Dolphin Expressway (SR 836) just after you pass over Le Jeune Road and Miami International Airport appears on the north side of the road. This is our Bermuda Triangle, the place where time inexplicably vanishes. There never appears to be a good reason for the sudden crush of cars slowing to a crawl -- no accident, no disabled vehicle, no construction. It just is. Could there be some unknown force field that compels Miami drivers to drop to school-zone speed (which, ironically, they rarely observe in actual school zones)? What up, Miami?