Will $100 billion transportation mega-measure be put at risk by SF supervisors?

Two San Francisco supervisors are urging the city to withhold support of a regional tax measure that would benefit what its backers say are desperately needed — but monumentally expensive — transportation projects like Caltrain’s extension to downtown San Francisco and a second Transbay Tube for BART.
Supervisors Shamann Walton and Aaron Peskin said at a public meeting Tuesday they won’t support the $100 billion measure without a change to how Caltrain is governed.

Rachel Swan is a San Francisco Chronicle staff writer

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