(Northbound San Tomas Expressway; Campbell, California)
--Photo taken by Carlos Rogers
    Map Location: 37.29515, -121.96063

Route G4, which serves northern Santa Clara County, is fundamentally an amalgamation of two distinct expressways.  Between its southern terminus at CA-17 and US Federal Route 101, the route overlays the San Tomas Expressway.  North of Federal Route 101, the route bends eastward and becomes known as the Montague Expressway. 

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