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The Posey Tube is one of a pair which, together with the Webster Street Tube, connect Alameda Island with the city of Oakland for vehicles. The tunnels run beneath the Alameda-Oakland Estuary, and the Posey Tube, which was the original, has been in use since 1928. The Webster Tube was built to supplement the Posey Tube in the 1960s after the traffic load between Oakland and Alameda increased to more than the Posey Tube could handle on its own. The Posey Tube is the second oldest underwater tunnel for vehicles in the United States, after only the Holland Tunnel which connects New Jersey to the island of Manhattan.

Posey Tube
© Courtesy of Mike Mareen - Fotolia.com

Rating: ⭐⭐⭐⭐⭐

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