Category Archives: Updates

Highway 4 Corridor Projects Update – Spring 2014

The Highway 4 projects include improvements that will help modernize eastern Contra Costa County. The projects expand Highway 4 from four to eight lanes between Loveridge Road in Pittsburg to just west of State Route 160 in Antioch, from two to four lanes from Lone Tree Way to Balfour Road in Brentwood, add connector ramps at the State Route 160/Highway 4 interchange, and add a BART extension from Pittsburg to Antioch (eBART). These projects will greatly improve transit accessibility for the region, help reduce traffic congestion, and enhance the quality of life for the more than 250,000 residents of eastern Contra Costa County. The projects have been carefully staged to keep 130,000 vehicles per day moving as major construction and demolition work continue. This email provides an update on current and upcoming construction activities.

Photo by Karl Nielsen, CCTA

Loveridge Road & Somersville Road Segments Open to Traffic

On December 17, 2013, the Contra Costa Transportation Authority and Caltrans opened the two additional westbound highway lanes to traffic on the Loveridge and Somersville segments, including one High Occupancy Vehicle (HOV) lane. A portion of the eastbound lanes from Loveridge Road to Contra Loma Boulevard/L Street opened in November 2013. With these lanes opened, the Somersville Road/Auto Center Drive work is now complete. Some minor additional work is ongoing on the Loveridge Road segment, which is expected to be complete soon.

Photo by Karl Nielsen, CCTA

Sand Creek Road Update

The first stage of construction on the Sand Creek Road Interchange project was completed in late August 2013. Eastbound traffic now travels on the newly-completed eastbound bridge over Sand Creek Road. Eastbound and westbound traffic are expected to be traveling on separate, two-lane bridges over Sand Creek Road when construction is complete in late 2014.

State Route 160/Highway 4 Direct Connector Ramps Construction Underway

The existing State Route 160/Highway 4 Interchange currently includes two of the four possible interchange movements: the eastbound Highway 4 to northbound State Route 160 connector ramp and the southbound State Route 160 to westbound Highway 4 connector ramp. The State Route 160/Highway 4 Direct Connector Ramps project will construct the remaining two connector ramps, one connecting westbound Highway 4 directly to northbound State Route 160, and one connecting southbound State Route 160 directly to eastbound Highway 4. The project is funded by $50 million in Bridge Toll Funds. State Route 160 connects to the Antioch Bridge (also known as the Senator John A. Nejedly Bridge).

The giant cranes now in place on site are a visible signal that the project, which started in late March, is gaining momentum. Utility relocation and clearing and grubbing on the site are underway. Major construction will last between 18 to 24 months. The project also includes adding an additional 12-foot auxiliary lane to the outside of existing State Route 160 in both directions from the State Route 160/Highway 4 Interchange to the East 18th/Main Street Interchange, as well as building a soundwall extension and retaining walls. Check out the Highway 4 website for more information as this project continues.

Simulation of completed connector ramps project.

Upcoming eBART Construction at Hillcrest Ave

There has been a lot of progress on the construction at Hillcrest Avenue. Utilities are installed, the new eBART parking lot is complete, and the eBART maintenance building is nearly finished. Starting in mid-June, crews will begin work on the foundation for the eBART entry house and pedestrian overcrossing to lay the groundwork for future eBART ridership in Antioch. Trains are expected to start running in 2017, following a year of extensive systems testing.

Artist rendering of eBART running in the median of a widened Highway 4.

Upcoming Traffic Shift for Contra Loma Blvd/L Street and Lone Tree Way Segments

In order to make room for construction of new westbound lanes, current westbound traffic on the Contra Loma Boulevard/L Street and Lone Tree Way/A Street segments will be shifted to the south to travel on temporary lanes adjacent to eastbound traffic. Please check our Traffic Updates web page and Twitter feed for an announcement of the traffic shifts, which will occur at night to minimize disruption to motorists.

Traffic on the Contra Loma Boulevard/L Street segment will be shifted in early June, and the new configuration will be in place until the segment is complete in late 2015. Traffic on the Lone Tree Way/A Street segment will shifted in mid-June, and the new configuration will be in place for several months.

The traffic shifts will also allow for the demolition of the old Contra Loma/L Street undercrossing and the Lone Tree Way/A Street bridge. Demolition work will begin shortly after the traffic shifts.

In the News

California Highway Expansion Eases Commute, Civil Engineering Magazine

New lanes open to traffic on Highway 4, Brentwood Press

Construction Starts on SR 160/HWY 4 Direct Connector Ramps, East County Today

Roadshow: eBART trains along Highway 4 could be running in 2017, Contra Costa Times

Contact Us

Sign up to receive update emails at: http://4eastcounty.org/contact/

Project info line: 925.756.0721

Project email: info@4eastcounty.org

Follow us on Twitter: http://twitter.com/4eastcounty

The Highway 4 projects include improvements that will help modernize eastern Contra Costa County. The projects expand Highway 4 from four to eight lanes between Loveridge Road in Pittsburg to just west of State Route 160 in Antioch, from two to four lanes from Lone Tree Way to Balfour Road in Brentwood, add missing connector ramps at the State Route 160/Highway 4 interchange, and add a BART extension from Pittsburg to Antioch (eBART). This will greatly improve transit accessibility for the region, help reduce traffic congestion, and enhance the quality of life for the more than 250,000 residents of eastern Contra Costa County. The projects have been carefully staged to keep 130,000 vehicles per day moving as major construction and demolition work continue. These projects, plus previously constructed projects in the region, bring the total investment in East County to $1.3 billion, including State, Federal, Contra Costa Transportation Authority Measures C and J, regional bridge tolls, and other funds.

Highway 4 Corridor Projects Update – Winter 2014

The Highway 4 projects include improvements that will help modernize eastern Contra Costa County. The projects expand Highway 4 from four to eight lanes between Loveridge Road in Pittsburg to just west of State Route 160 in Antioch, from two to four lanes from Lone Tree Way to Sand Creek Road in Brentwood, add connector ramps at the State Route 160/Highway 4 interchange, and add a BART extension from Pittsburg to Antioch (eBART). These projects will greatly improve transit accessibility for the region, help reduce traffic congestion, and enhance the quality of life for the more than 250,000 residents of eastern Contra Costa County. The projects have been carefully staged to keep 130,000 vehicles per day moving as major construction and demolition work continue. This email provides an update on current and upcoming construction activities.

Photo by Karl Nielsen, CCTA

Sand Creek Interchange Project Completion

The Contra Costa Transportation Authority (CCTA) and Caltrans celebrated the completion of the Sand Creek Interchange on October 24, 2014. The completion of the interchange brings much needed congestion relief to eastern Contra Costa County by expanding Highway 4 from two to four lanes and removing the stoplight from Highway 4 at the Sand Creek Road intersection.

In August 2013, a new eastbound bridge over Sand Creek Road and two new eastbound lanes to traffic were opened to traffic. CCTA was able to fund a second, westbound highway bridge as part of this project with cost savings realized on this construction contract and a $5 million contribution of Measure J funds.

Photo by Karl Nielsen, CCTA

Future projects in the area include replacing the existing signalized, at-grade intersection at Balfour Road and Highway 4 with a full access-controlled, grade-separated interchange. Highway 4 will be raised to cross over Balfour Road, creating a new undercrossing.

Night Work on Contra Loma Boulevard, Lone Tree Way, and Hillcrest Avenue Segments

Key portions of the work on the Highway 4 segments in Antioch occur at night in order to avoid impacting commute traffic during the day. While this work may not always be visible to those traveling the corridor, significant progress is being made on each segment. Current work includes completing the foundations for the new bridges at Contra Loma Boulevard/L Street and Lone Tree Way/A Street and constructing retaining walls at Hillcrest Avenue.

Photo by Karl Nielsen, CCTA

The Loveridge Road and Somersville Road segments were completed in late 2013, and are already bringing improvements to traffic on Highway in those areas.

Falsework Installation for the 160/4 Connector Ramps

The State Route 160/Highway 4 Direct Connector Ramps project will construct two new connector ramps between Highway 4 and the Antioch Bridge: one connecting westbound Highway 4 directly to northbound State Route 160, and one connecting southbound State Route 160 directly to eastbound Highway 4.

Crews have completed most of the foundation work for these ramps and have started installing falsework (temporary support structures) for the superstructure of these ramps. Falsework construction mainly occurs at night as it involves closing portions of the highway so cranes can lift heavy steel beams over the lanes of traffic.

The project is on track for completion in late 2015.

Falsework installation

eBART Update

Construction has started for some of the eBART elements at Hillcrest Avenue, including the entry house (where customers will enter the eBART station) and the pedestrian overcrossing that will lead to the new platform in the median of the highway. Work is complete on the new parking lot for the eBART station, and the contracts for purchasing eBART train cars and track work construction have been finalized.

The future of eBART is East County is even brighter, with funding recently obtained for a new Pittsburg City Center station.

Contact Us

Sign up to receive update emails at: http://4eastcounty.org/contact/

Project info line: 925.756.0721

Project email: info@4eastcounty.org

Follow us on Twitter: http://twitter.com/4eastcounty

The Highway 4 projects include improvements that will help modernize eastern Contra Costa County. The projects expand Highway 4 from four to eight lanes between Loveridge Road in Pittsburg to just west of State Route 160 in Antioch, from two to four lanes from Lone Tree Way to Sand Creek Road in Brentwood, add missing connector ramps at the State Route 160/Highway 4 interchange, and add a BART extension from Pittsburg to Antioch (eBART). This will greatly improve transit accessibility for the region, help reduce traffic congestion, and enhance the quality of life for the more than 250,000 residents of eastern Contra Costa County. The projects have been carefully staged to keep 130,000 vehicles per day moving as major construction and demolition work continue. These projects, plus previously constructed projects in the region, bring the total investment in East County to $1.3 billion, including State, Federal, Contra Costa Transportation Authority Measures C and J, regional bridge tolls, and other funds.

Highway 4 Corridor Projects Update – Fall 2013

The Highway 4 Corridor Improvements include the highway, its interchanges, and affected local roadways from Pittsburg to Antioch as well as the Sand Creek Interchange and Balfour Road projects near Brentwood. These projects, along with the BART extension (eBART), represent a $1.3 billion dollar investment in the infrastructure of eastern Contra Costa County. The main highway corridor is being widened from four to eight lanes. One lane in each direction will be dedicated to carpools and transit vehicles. But this isn’t just another highway widening project. Transit through the corridor will also be improved when the new eBART line is constructed. The project will add 10 miles of eBART track from Pittsburg Bay Point to a new Antioch station at Hillcrest Avenue.

The five main corridor projects are moving along, with the highway improvements expected to be complete in late 2015. The Loveridge Road and Somersville Road/Auto Center Drive segments are expected to open to traffic in late 2013 (more details below). Crews will set precast girders for the bridge over Contra Loma Boulevard/L Street and will pour the deck for the new bridge over Lone Tree Way/A Street this fall. The building of sound walls, retaining walls and preparing the median for eBART are all in progress.  And work has begun for utility relocation and roadway excavation at Hillcrest Avenue, which will be the site for the new eBART station.

The first stage of construction on the Sand Creek Road Interchange project was completed in late August. Eastbound traffic now travels on the newly-completed eastbound bridge over Sand Creek Road. This is the first step in a series of traffic switches that will culminate in eastbound and westbound traffic traveling on separate, two lane bridges over Sand Creek Road by late 2014, alleviating the bottleneck at this intersection.

Work on the eBART transfer platform at the Pittsburg/Bay Point station is 95% complete, with crews currently working on the track and train control elements. Work is also underway for the eBART station in Antioch at Hillcrest Avenue, where workers are preparing to pave the new parking lot. Work has also begun on the maintenance building and utilities for the station.

Loveridge and Somersville Segments Expected to Open to Traffic in Late 2013

The two westernmost segments of the Highway 4 projects are Loveridge Road and Somersville Road/Auto Center Drive.

Construction on the $74.1 million Loveridge Road segment began in June 2010 and includes expanding the highway from four to eight lanes, including three mixed flow lanes and one High Occupancy Vehicle (HOV) lane in each direction, from just west of Loveridge Road to just west of Somersville Road/Auto Center Drive, and reconstruction of the Loveridge Road interchange.

Construction on the $43.2 million Somersville Road/Auto Center Drive began in March 2011 and includes expanding the highway from four to eight lanes, including three mixed flow lanes and one High Occupancy Vehicle (HOV) lane in each direction, from just west of Somersville Road/Auto Center Drive to just west of Contra Loma Boulevard/L Street, and the reconstruction of the Somersville Road/Auto Center Drive interchange.

Both projects include freeway auxiliary lanes and a median wide enough to accommodate mass transit (eBART).

Major construction on Somersville Road/Auto Center Drive is expected to be complete later this year. The CCTA recently secured funding to accelerate construction on Loveridge Road to complete the freeway lanes on the segment by late 2013 (these dates are weather dependent). A portion of the eastbound lanes from Loveridge Road to Contra Loma Boulevard/L Street is expected to open in November. Click on the schematic below for more information on these lane openings.

The new westbound lanes from Contra Loma/L Street are expected to open in late December. More information will be posted to the website when the details of these lane openings are finalized. Completion of these projects will help alleviate current traffic congestion along the Highway 4 corridor.

Construction Staging Critical to Keeping Traffic Moving on Highway 4

It takes a lot of planning to replace bridges, add lanes, and widen a median on a highway – all while keeping traffic moving at its original capacity. In order to do this, construction is divided into stages that adjust the location of lanes on the highway while new elements are built. The graphic below illustrates this process for the Hillcrest Avenue segment of Highway 4.

In the News

Cost savings allow more lanes for Highway 4 widening in Brentwood, Contra Costa Times

Burrowing owl nest found in path of Highway 4 widening, Contra Costa Times

Landmark Antioch sign spruced up by autistic teens, Contra Costa Times

Final improvements underway to Highway 4, ABC 7

Contact Us

Sign up to receive update emails at: http://4eastcounty.org/contact/

Project info line: 925.756.0721

Project email: info@4eastcounty.org

Follow us on Twitter: http://twitter.com/4eastcounty

The Highway 4 projects include improvements to the entire project corridor that will help revitalize eastern Contra Costa County. The projects expand Highway 4 from four to eight lanes between Loveridge Road and SR-160, and add a BART extension from Pittsburg to Antioch (eBART). The projects will also expand the highway from two to four lanes from Lone Tree Way to Sand Creek Road. This will greatly improve transit accessibility for the region and help reduce traffic congestion and enhance the quality of life for the more than 250,000 residents of eastern Contra Costa County. The projects have been carefully staged to keep 130,000 vehicles per day moving as major construction and demolition work continue, and include over $1.3 billion in State, Federal, Regional Bridge Toll, and Contra Costa Measures C & J sales tax funds.