East Bay Times: Federal funding gap demands a cheaper option for BART extension

from blog lily's thots, | ↗ original
But then, in 2018, it all changed, supposedly to appease some downtown merchants. From then on, the VTA staff has been struggling to plan for a single-bore tunnel, about 53 feet in diameter with platforms buried eight stories underground, that will require tunnel lining twice as thick as originally planned and excavation of millions more cubic...