I've been doing our road for quite a while. I use a Kubota compact tractor and a 7' landscape rake set at 45 degrees. The rake at 45 degrees prevents you from creating moguls, and allows dirt from the sides to be pulled into the middle to help form a "crown" that helps prevent puddles from forming (water runs to the sides). No puddles = no washouts (large pot holes) created when morons just blast though them.
I can do 100yds or so of fairly hard/road gravel base road that's pretty tore up in about an hour.
Something that's got a large washout might take a little more time and different plan of attack.
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake