Huge thread (do a search for Driveway Problems) about driveway problems when I first got my Skyline (well after I lowered it )... I have one bloody steep driveway and if it weren't for the planks of wood, my front bar would be no more
Pros for the wood:
1) They are very very cheap, use offcuts from anywhere
2) Quite light and not too hard to setup
Cons for the wood:
1) Not good in the rain
2) Gets bloody annoying when they start to rot away
3) Depending on your road surface, it will start to destroy itself.
My next plan is to get some steel drainage vents (maybe 2m x 1m) which I can mount on top of the driveway as stated above in a previous post. Not only will this get rid of most of the cons, but will also make a nice addition to my shoddy driveway
Just some thoughts...