roads are usually closed before 4wd vehicles are required to have chains (unless you are towing) they figure that if a 4wd vehicle needs chains then a 2wd vehicle with chains wont make it, and therefore a road closure. i have never seen an occasion where a 4wd vehicle not towing was required to have chains on. for the last 5 years i have been to tahoe every winter and we always seem to manage to go when its snowing out. traffic sucks, due to all the 2wd vehicles, but chains were never required for 4wd vehicles. now if you are talking about road that dont get plowed, then maybe it will be a good idea to have some. but for a familiar road and a highly traveled road, you shouldnt need them. im not saying dont go out and buy some, its good to have, but depending on the road it could be an optional tool in the bag. just remember to drive in the tracks the vehicle makes in front of you...... unless you are like me and like to do weird random shit and do donuts in the snow while others are putting chains on.......
