I have a 1/2 mile long driveway. I don't have ditches exactly, but a reasonable crown on all but about 40 yards. On the 40 yards, it is right next to my neighbor's yard, so that section slopes slightly across the roadbed to the down hill side. Other tnan that, the crown drains the water off to the side of the road and drains away at the bottom of small hills.
In a couple of cases there was no bottom of hill depression for the water to drain, so I dug out a "swale" that gave the water a place to drain and soak away. There was a longer hill where the water drained of the road well, but gained too much velocity running down the side of the road and caused erosion. I cut a swale on each side of the road about 1/3 of the way down the hill to give the water an off ramp so that it wouldn't continue to pick up speed.
The crown and the swales have worked very well.