A project is underway to add a 2nd tunnel using a tunnel border. This increases the effective width from one to two lanes of traffic in each direction; four to

A project is underway to add a 2nd tunnel using a tunnel border. This increases the effective width from one to two lanes of traffic in each direction; four total lanes between the two tunnels. The borer moves 50-60 feet per day; at this rate they expect to finish the boring process in a year. https://www.cbbt.com/tunnel-project/ https://www.cbbt.com/tunnel-project/