The Caldecott Tunnel cuts through the East Oakland hills to connect Oakland to the adjoining county. Since the 3rd bore was drilled in the 1960s, Contra Costa County has had a huge surge in population and is now a bedroom community to the East Bay and San Francisco. You can see that commute time involves long waits to crawl through the tunnel. Hopefully the 4th bore, due to be completed in 2013, will help alleviate this traffic snarl. We'll see. Tip: During the most intense commute period, you can drive a winding road over the hills faster than you can drive through the tunnel. Shhh, don't tell. P.S. Note the deer sign. Even though we live in a highly urban area, wildlife is abundant. Besides deer, it is common to see coyote, possum, skunks, and foxes. On occasion, people spot mountain lions. Really.