Great question Phil. Here's some information about the asphalt/concrete replacement from the Caltrans I-680 Pavement Rehabilitation and Southbound HOV Lane Extension Construction FAQs http://www.dot.ca.gov/dist4/680ccrehab/

It would be ideal to replace all damaged pavement with concrete material because of its long term performance, but it is an expensive material. The condition of the existing freeway pavement at the northern portion of the project (Diablo to Rudgear) has deteriorated to the point where it is no longer feasible to consider extensive concrete replacement because of the cost. The recommendation is to crack the existing concrete pavement to provide a suitable foundation for the rubberized asphalt overlay.
The condition of the existing concrete freeway pavement is significantly better at the southern portion of the project (Alcosta to Diablo) and it is cost effective to do spot replacement of damaged pavement slabs with concrete material.

Greg, Thanks for the comment. Tunnel crews stopped work on the bench on the western end of the tunnel earlier this month to enable them to resume work on the top heading in this area. Work on the bench will resume the week of November 7. Be sure to check out the Caldecott Tunnel Trivia game for this week's Quiz and a chance to win $10 Peet's card compliments of 511 Contra Costa.

Thank you for the clarification, @pceasy.

I love this video. It's so cute and who said cardboard cutouts aren't cool!

Bill, Sorry about that. Can you provide the serial number on the back of the card and we'll see what we can do to fix it. Email support@511contracosta.org.

Agree with the bit regarding Canal trail to Muir Rd. That hill is steeper than it looks. We rode the route to the Amtrak train station in Martinez and that section of the Muir Rd is tough! Unfortunately the flat routes are on-street in areas with a lot of debris in the bike lanes.

We're glad the Hercules Transit Center Energizer Station had a good turn out. The Transit Center is a great place to bike and ride (transit or carpool). Use the eLockers there!!

I'm sorry you missed us. We were located at the closest trail entrance about 20 yards from the 1st and Buena Vista intersection. It was great to see the families with children enjoying the evening on the local trails.