Category Archives: Highways

Staff report from the May 17, 2023, meeting of the Contra Costa Transportation Authority The Interstate 680/State Route 4 Interchange Improvements, the Project is being delivered based on available funding. Phase 3 was completed on May 1, 2023. Phases 1, … Continue reading →

The State Route 239 online open house is now ready for visitors and will remain open until January 18, 2023. This website offers important details about the environmental evaluation of this project, the environmental process, a poster gallery for easy viewing of technical information, … Continue reading →

READY FOR VISITORS – SR 239 ONLINE PUBLIC SCOPING OPEN HOUSE Caltrans has released a Notice of Preparation (NOP) for an Environmental Impact Report (EIR) for the State Route 239 project and is seeking your input. We continue to engage … Continue reading →

SR239 is a legislatively adopted, but unconstructed, route in the California state highway system. First identified in 1959, the legislative language describes SR239 as a potential roadway linking SR4 in Brentwood to Interstate 205 (I-205) or I-580 west of Tracy … Continue reading →

Flooding is again bedeviling Highway 37 in the North Bay, but a plan to improve the stretch of roadway is in the works. A memorandum of understanding among several agencies is being worked on with a goal of providing relief for Highway … Continue reading →

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 →

CALIFORNIA KEY TRANSPORTATION FACTS THE HIDDEN COSTS OF DEFICIENT ROADS Driving on California roads that are deteriorated, congested, and that lack some desirable safety features costs California drivers a total of $61 billion each year. TRIP has calculated the cost … Continue reading →

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 →

Experienced Bay Area drivers know it’s a good idea to build in some extra time as a cushion against heavier-than-normal traffic or other unforeseen events. This cushion is known as a buffer time index, or BTI. Transportation planners represent BTI … Continue reading →

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 →

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 →

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 →

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 →

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 →