The Interstate 680 (I-680) Express Lane Completion project is part of the Contra Costa Transportation Authority’s (CCTA) INNOVATE 680 program, which seeks to implement a suite of six projects that, when operating together, will address corridor-wide congestion, travel delays, and operational challenges. The Express Lane Completion project proposes to construct a northbound express lane from Livorna Road to State Route 242 (SR-242). This project would also convert the existing northbound High-occupancy vehicle (HOV) lane that runs from SR-242 to the Benicia-Martinez Bridge Toll Plaza, to an express lane.The goal of the project is to complete the I-680 express lane network through Contra Costa County to increase travel speeds for those choosing to travel by carpool, vanpool, or motorcycle.CCTA, in partnership with the Metropolitan Transportation Commission (MTC) and the California Department of Transportation (Caltrans), has started preliminary design and environmental analysis on the Express Lane Completion project to better understand possible solutions that will improve operations and mobility on this critical corridor.