I always use the county highways that run between the farmland just outside of Davis. These highways have a posted speed limit of 55mph, but most people drive around 80. There are generally very few cars, absolutely no pedestrians, cross-walks, etc, and very few police patrol these roads. They are also completely straight for miles with great visibility. Its pretty much the best possible place for road tuning aside from a closed track.

However, as I tell everyone, if you don't feel completely comfortable with doing 3rd gear pulls (4th gear for STI's) in such conditions, Dyno tuning is probably a better option for you.

Thanks