The staff report on this project is here:
http://www.cityofsanmateo.org/DocumentView.aspx?DID=9918
Cycling on ECR under the highway has always been a pain in the ass. This may be an opportunity to improve it for cyclists. The key phrases for an email are "Grand Boulevard", "AB 1358 Complete Streets Act", and "Caltrans DD-64-R1." Anytime Caltrans reworks roads it must now consider all of the users of those roads.
http://www.dot.ca.gov/dist4/transplanning/docs/dd64r1signed.pdf
-M