Proposals for a less expensive alternative to an extension of the current system include a light rail plan.
In an effort to alleviate constant traffic congestion in the Bay Area, Bay Area Rapid Transit (BART) officials are proposing a cheaper, easier-to implement program called "eBART" in eastern Contra Costa County. The new proposal, which would cost one-tenth the price of the previously proposed and much debated BART extension to Antioch, would provide transportation even further east to service commuters as far as the San Joaquin Valley. The proposed eBART, which would run light, diesel-fueled trains on preexisting, underutilized Union Pacific tracks, could provide relatively quick relief for east bay traffic problems. While many transit advocates praise the new plan as a logical, cost-effective remedy, BART officials are examining sources of funding for further research and preparing for criticism for people who would rather have wider freeways than a new train system.
Thanks to California 2000 Project
FULL STORY: BART Considers Using Speedy Light Trains

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