What is the length of tractor with trailer?

For a typical five axle line haul unit with a sleeper, you'd be looking between 65 and 80 feet, all told. Depends on the wheelbase of the tractor, and the length of the trailer... with a Volvo VNL730 and 48' flatbed or stepdeck, I was looking at roughly 68 or 69 feet in length, and that's with the fifth wheel slid all the way back. For a Kenworth W900L with a 270 inch wheelbase and a 53' lowboy trailer, I was looking at about 77 or 78 feet in length. Doing heavy haul, you'll run into longer combinations... I've run combinations well over 100 feet in length.