Michael Driving eastward from San Francisco, i.e. towards Oakland, you'll find yourself on the busy freeway I-80 that leads over the Bay Bridge. The bridge consists of two sections: the western section that leaves San Francisco and the eastern section that connects it to the other side of the bay in Emeryville. Almost exactly at the center of the bridge, which spans an impressive five miles total, it is propped up on an island in the bay, called "Yerba Buena Island". This mini-island is also connected to another, larger island named "Treasure Island" via a short road that leads over the water at sea level (Figure 2).
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