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Fifty years ago this month, the key freeway link for the Tri-Valley was completed when Interstate 680 opened between Pleasanton and Mission San Jose. The I-680/I-580 interchange opened with its original cloverleaf configuration in December 1965, but it wasn’t until 1967 that the final stretch opened to traffic. That was back in the day of […]

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CalMatters is a Sacramento-based nonpartisan, nonprofit journalism venture committed to explaining how California's state Capitol works and why it matters. It works with more than 130 media partners throughout the state that have long, deep relationships with their local audiences, including Embarcadero Media.