Demonstration of a 20 inch whirlaway pressure cleaner sweeper on my driveway. Running it with a North-star Honda 13hp, 4000psi, 3.5gal a min pressure washer.
My driveway and walkway would have taken about 8+ hours, but this cut it down to less than 2 hours. Beforehand I did edge most everything with the pressure washer wand to speed things up, and also using a grass type edger also helped beforehand to allow the water to run off the driveway.