Why is VTA building a BART Extension instead of BART?

When the BART District was formed in the 1960s, Santa Clara County opted out. As population and job growth rose in Santa Clara County, congestion along the I-880 and I-680 corridors grew as well. VTA’s Major Investment Study showed a BART extension was the best transit solution on the east side of the bay to provide an alternative to the congested I-880 and I-680 corridors.