680 SB EXPRESS LANE PROJECT |
15768
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ARROWS FADE-IN GRAPHIC

680 Southbound Express Lane Project
(Martinez to Walnut Creek)

About the Project

In October 2018, CCTA began construction of 11 miles of express lane on southbound I-680 between Marina Vista Avenue in Martinez to Rudgear Road in Walnut Creek. In addition, restriping will extend to El Cerro Boulevard in Danville. Eight miles of an existing HOV/Carpool lane will be converted to an express lane and the remaining three miles will be constructed as a new HOV/Carpool lane that will open as an express lane. Once construction is complete, there will be 24 miles of continuous southbound express lane between the Benicia Bridge Toll Plaza and the Alameda County line.

What to Expect During Construction

The majority of work activities will occur on the freeway within existing state right-of-way to construct the express lane. Work will occur simultaneously in multiple areas within the corridor. To minimize impacts to the traveling public, construction activities will occur during the daytime, nighttime as well as the weekend. To allow adequate space for widening work south of Rudgear Rd., the start of the existing express lane will temporarily shift approximately three quarters of a mile to south. Motorists may experience traffic delays due to temporary lane closures and reduced lane widths and speeds through the construction zone.

Construction Activity

Construction Schedule

Work Scheduled for April 2020 (Weather Depending)

  • Complete construction of Retaining Wall No. 4 on SB I-680 from South Main Street to Crest Avenue.
  • Complete electrical construction on I-680 between the Benicia-Martinez Bridge and SR-24.
  • Continue highway and ramp widening on SB I-680 at various locations between Monument Boulevard and Olympic Boulevard.
  • Continue highway and ramp widening on SB I-680 between South Main Street and Livorna Road.
  • Continue construction of the sound wall on Retaining Wall No. 1 on SB I-680 just north of Livorna Road.
  • Continue construction of the concrete barrier between Retaining Wall No. 1 and Retaining Wall No. 3 on SB I-680 from Rudgear Road to Livorna Road.
  • Continue construction of the concrete barrier and sound wall on Retaining Wall No. 4 on SB I-680 from South Main Street to Crest Avenue.
  • Continue construction of Retaining Wall No. 5 between the SB I-680 on- and off-ramp from South Main Street.
  • Begin construction of signal modifications at the intersection of the SB I-680 on- and off-ramps and South Main Street.

Construction Map

Public Impacts

Landscaping Concepts

Concept #1: Brookdale Court

Concept #2: Danville Boulevard at Northbound I-680

Concept #3: South Main Street