Don't bother, mostly a dirt road. It's a nice day run for some good scenery and lunch with a good view if you're local. It's also fun in a stock or nearly stock vehicle. It's our bread and butter Sat trail around here for a nice day trip with friends.
Actually, Freeway Ridge is the section of trail that leads from the main highway up to the dirt road that becomes Black Gulch Trail, or what we simply call Keyesville. There are a couple other trails that branch off from Black Gulch. You could have a nice weekend camping in the area and exploring the vaious routes, but I don't think I'd drive down from Lodi, too much nicer stuff closer.