I-680 construction underway | 511 Contra Costa

I-680 construction underway

Are you in one of the 170,000 vehicles that passes across I-680 every day? Is your suspension still reeling from the potholes and cracks? You’re in luck.
Caltrans began work in January rehabilitating 12.8 miles of freeway from Alcosta to Rudgear. Caltrans is also expanding the HOV lane on the southbound side about one mile form Livorna Road to just short of Rudgear Road.
Both projects are expected to finish in spring 2012.
Most construction will take place at night, and barriers will be in place during the day, but don’t forget to “Slow for the Cone Zone.”
The general work windows vary slightly by location.
Work window from Alcosta Blvd. to Sycamore Valley Road
Mon. – Fri. 8 p.m. to 6 a.m.
Sat. 8 p.m. to 9 a.m.
Sun.  8 p.m. to 10 a.m.
Work window from Sycamore Valley Rd. to El Pintado Rd.
Mon. – Fri 7 p.m. to 6 a.m.
Sat.  7 p.m. to 9 a.m.
Sun. 7 p.m. to 11 a.m.
Work window from El Pintado Rd. to Rudgear Road
Mon. – Fri. 8 p.m. to 6 a.m.
Sat. 8 p.m. to 8 a.m.
Sun. 8 p.m. to 11 a.m.
With 7,300 cubic yards of pre-cast concrete, this will be the largest application of this innovative treatment in the US. Pre-cast slabs are expected to reduce the need for long-term maintenance, and can be driven over immediately – no need for drying time.
$72 million of the rehabilitation and HOV project is funded by the CA State Funding for Roadway Rehabilitation (SHOPP) program, plus $1.8 million from Contra Costa County Measure J (half-cent sales tax).

0 thoughts on “I-680 construction underway

  1. At first I thought it had to do with the high speed monorail, but this clears it up.
    Thank you!

  2. During the late evening hours (after 11 p.m.), the construction has actually CLOSED exits on 680 without warning. For the past 3 weekends while traveling north on 680 towards San Ramon, I found the Crow Canyon and Sycamore Exits closed and had to travel 12 extra miles going north and then back. By simply putting construction signs out to ALERT drivers that the exits would be closed, would save LOTS of drivers time and gas and not to mention unnecessary aggravation. I'm glad they are fixing the exit ramps, but all they need to do is NOTIFY us via SIGN beforehand, so we have the option to exit on a street BEFORE the closures.
    If anyone can help notify the DOT or construction crew on this, it would be VERY helpful. Now, I'm apprehensive of taking my proper exit in the evenings and get off 680 on Bollinger Road just in case they do it again without warning.

    1. 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.

  3. I see the scope of the project is to finally address 680 SB going from 6 lanes to 3 just before Livorna, by extending the HOV North to 1/4 mile north of Rudgear. While this appears to have been done on the NB site, still anxious to see this corrected going SB.

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