With the BART extension to Livermore planned to run in the I580 median, there is one small problem: the median is just a tiny bit too small to accommodate two tracks.
No problem, says Alameda County, we’ll just widen the median. And while we’re at it, may as well expand the highway too:
The Alameda County Congestion Management Agency (ACCMA) in partnership with the California Department of Transportation (Caltrans) and the Alameda County Transportation Authority (ACTIA) is developing a strategy that will identify and acquire the ultimate right of way along the I-580 corridor from the Hacienda Drive Interchange in Pleasanton to beyond the Vasco Road Interchange in Livermore.
The ultimate right of way will be a maximum of 246 feet wide to include provisions for:
- A future 46-foot wide median transit corridor.
- 14-foot inside shoulders in each direction.
- 12-foot wide high occupancy toll (HOT) lanes with 4 foot outside buffer in each direction.
- Four 12-foot wide mixed flow lanes in each direction.
- 12-foot auxiliary lanes and 10-foot outside shoulders in each direction.
Once again, we have a transportation agency working at cross purposes. The new highway capacity will be in direct competition with the billion-dollar BART extension.
Also note that the CA High-Speed Rail Authority rejected the I580 corridor for an Altamont route because….even at 246′ they say the ROW will be too constrained.