SAN FRANCISCO (CBS SF) — BART has released a comprehensive plan for the next decade that could include a second transbay tunnel in its effort to increase Bay Area service.

The agency unveiled the outline to the San Francisco County Transportation Authority Board committee recently.

BART’s acting manager for strategic planning and development told the committee that regional transportation agencies plan to fund a study of the tube, according to SF Street Blog.

The new tube could stretch from San Francisco’s Richmond District in the west, crossing underneath existing transit lines on Market Street before carrying passengers to various location in the East Bay.

BART sketched out conceptual routes, but has yet to estimate when the project could be completed, or the cost.

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