A Big Freeway Entrance

Northbound Interstate 580's entrance into the MacArthur Maze in Oakland

Here's the entrance into the MacArthur Maze on northbound Interstate 580 in Oakland. If you look closely at the left support post, you'll see a sign that says Toll Crossing Entrance (rather than Freeway Entrance), indicating that this is also the entry to the toll gates for the San Francisco-Oakland Bay Bridge.