DC-ATE
You'd be amazed. Usually done at three on a Monday morning*, a big tractor in front and one guy with two fistfuls of levers on a console clipped onto the last bogie, walking behind, steering the beast, all the steering on the double sets of tyres synchronised. The route's measured out beforehand in 3D but, of course, occasional mistakes do happen as do hydraulic leaks. Usually at seven-thirty in the morning.
*the preference for Monday morning is simply due to the fact that the guy on the levers is not as likely to be obliterated by a Jersey (or Staten Island) driver as he might be on a Saturday night. But that's just hearsay
Edit: in fact, looking at that pic,and having an approximate idea of the several hundred tonnes that assemblage of bogies could handle, I do suspect there might have been a bit of overkill.