The Ted Williams Tunnel is a major transportation tunnel located in Boston, Massachusetts. It connects the Massachusetts Turnpike to the Logan International Airport, allowing for easier access to the airport and reducing traffic congestion in the area. The tunnel is part of the larger Big Dig project, which aimed to improve the city's infrastructure. Opened in 1995, the tunnel is approximately 1.6 miles long and runs beneath Boston Harbor. It features two lanes of traffic in each direction and is designed to accommodate both vehicles and emergency services. The tunnel plays a crucial role in facilitating travel and commerce in the region.