I was pulling a bridge girder on a dolly once and when I went south on rt.29 in Lynchburg the dolly driver decided to take 501 north for reasons unknown. He got it off the road halfway into the grass but I stopped before any damage was done or he went too far. We had one dolly that the driver controlled from the cab, but I never pulled that one. Pulled this one a lot- it was made from a Mack truck chassis. This beam was 150' long, went to rt.840 around Nashville. Pretty easy trip though, the only time we had to use the dolly was from the Carolina Steel plant in Abingdon, Va. to I-81 and after we got to the jobsite. I hauled lots of shorter beams to much harder places to get to. I think we had 3 of these old dollies, the big remote controlled unit, and 2 smaller hydraulic ones. These were a real pain in the ass to use, we carried two big wooden blocks to pull the steer axle onto, then you had to chain the axle to the beam to keep it off the ground, then use two chains criss-crossed to get the dolly straight, and every time you had to "drop the dolly" you had to get the blocks out and pull onto them to unchain the axle, then unchain the criss-crossed chains, drive the dolly, then redo every thing. Pulling them wasn't so bad, but I hated driving them. The hydraulic ones were my favorite. They had two hydraulic cylinders that turned a bolster on a platform on a tandem axle. Had a gas motor to run the pump, and you just moved a lever back and forth to turn it. All the driver had to do was run back there, start the motor, jump on and steer. When you got around the curve, you just had to get the dolly back straight, cut the motor off, jump back in the truck, and you were off. I liked to run those. Here's the hydraulic dolly at Banker Steel in Lynchburg.