The Holland Tunnel is a major underwater roadway that connects Manhattan in New York City to Jersey City in New Jersey. Opened in 1927, it was the first tunnel in the world to use a ventilated design, allowing for better air quality for vehicles traveling through it. The tunnel is approximately 1.5 miles long and is a vital transportation route for commuters and travelers. The tunnel features two tubes, each accommodating two lanes of traffic. It is named after the chief engineer, Clair L. Hills, who played a significant role in its construction. The Holland Tunnel is an essential part of the Port Authority of New York and New Jersey infrastructure, facilitating millions of crossings each year.