Had a bit of a problem with driveways and tracks at the farm the past year, 48" of rain in 4 months tends to test things out.
One section that was being used every 2-3 days feeding cattle got to the stage it was impassable with a 90hp 4WD tractor.
The biggest thing I have learnt over the years is make sure your drainage is good. Often a driveway/ track is the lowest point and ends up acting as a stream for all the water to get down hill the quickest and easiest way it can, it will cut them out in no time. Best solution is to build it up a little higher than the surrounding ground or at the very least put in good drains to run the water away from it.
Low spots that hold water are a problem I put in a pipe to allow water to drain away and build up the track.
Lots of work in making a track all weather, I spent over 50hrs with the skid steer, tractor and tipper repairing less than 100y that became impassable last winter. It was a low red clay section that didn't drain, every time you drove over it the ruts became a little deeper and in the end they were 3' deep. I dropped large rocks 2' or more in diameter in the bottom to give me a solid base, progressively smaller rocks on top and then river gravel on the very top once I got it back to the natural ground height. I also put a pipe under in the lowest point to allow surface water to get to the other side and flow away following the natural contour of the land.