Surface lot E is for oversized vehicles. As per port of Miami web-site:
Surface Lot E
Open lot with no overhead clearance with designated spaces for oversized vehicles
Accommodates oversized vans, recreational vehicles and vehicles with trailers
$22 per space, per day. If two spaces are utilized, $44 per day
If assistance is needed to park an oversized vehicle, please call 305-960-5463 or 305-960-6454