If they have such a turn over..

You gotta' remember, the general public has no idea how a business runs, whether it's a trucking company or an airline or a restaurant. The shipper just calls for a truck and loads his freight on and the truck leaves the lot and that's the end of it. Do you think the shipper is aware that his load may go VIA rail, or how about a wrecked truck that flipped over and the load was transfered to another truck and delivered as normal? The shipper sends his product then the consignee waits for the product to be delivered. JIT consignees might cry if the load is late, but loads destined for inventory are no big deal if late. Look at the rail roads with their terrible safety records, what with derailments all the time and lost rail cars and demolished rail cars. Yet, shippers still clamor to send their product by rail. Think of a shipper that send his product out at noon Monday, thinking his load is rolling, when in reality, it's just going to the trucking company's drop lot 10 miles away and sitting for 36 hours waiting for a team to pick it up and go.