Category Archives: Highway 4 Construction

I-680/SR4 Interchange Improvements – Phase 3

The contract has been awarded, construction should start this year and be completed spring of 2022. The 680/4 Phase 3 project will widen State Route 4 in the median to provide a third lane in each direction from Morello Avenue … Continue reading

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Interstate 680 / State Route 4 Interchange Improvements

A recent headline announced that the California Transportation Commission approved $34 million in funding for upgrades to the Interstate Highway 680/state Highway 4 interchange. Concord Assemblymen Tim Grayson was active in securing this funding. Because of the size of the … Continue reading

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Laser-equipped Drone Helps Improve Safety and Efficiency on Highway 4 Improvement Project

The Contra Costa Transportation Authority (CCTA) and Alta Vista Solutions showcased two emerging technologies on a construction project aimed to improve commutes on Highway 4. Engineers are piloting drones equipped with light detection and ranging (LiDAR) lasers–a surveying tool that … Continue reading

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Explore the Highway 4 Story Through Images

The Contra Costa Transportation Authority (CCTA) announces today the official launch of Story Through Images, a web feature devoted to celebrating the recently-completed Highway 4  Widening Project and ongoing BART construction project, a $1.3 billion investment in infrastructure in Eastern … Continue reading

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They’re Open – State Route 160/Highway 4 Direct Connector Ramps

The existing State Route 160/Highway 4 interchange previously included only two of the four possible interchange movements. The State Route 160/Highway 4 Direct Connector Ramps project created a much-needed connection between the Senator John A. Nejedly (Antioch) Bridge and Highway … Continue reading

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June 2015 – SR 4/SR 160 Connector Ramps – a Pictorial Update

When completed in early spring 2016, the SR 160 – SR 4 Connector Ramps will connect west bound SR4 with north bound SR160 without diverting traffic through Oakley roads. The project will feature sound wall extensions and new retaining walls … Continue reading

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SR 4/SR 160 Connector Ramps a Pictorial Update – February 2015

The existing State Route 160/Highway 4 interchange currently includes only 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. … Continue reading

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