The Oak Street Connector (Connecticut Route 34) intersects I-91 at exit 1, just south of the I-95/I-91 interchange, and runs northwest for a few blocks as an expressway spur into downtown before emptying onto surface roads. The Wilbur Cross Parkway (Connecticut Route 15) runs parallel to I-95 west of New Haven, turning northwards as it nears the city and then running northwards parallel to I-91 through the outer rim of New Haven and Hamden, offering an alternative to the I-95/I-91 journey (restricted to non-commercial vehicles). Route 15 in New Haven is the site of the only highway tunnel in the state (officially designated as <answer>Heroes Tunnel</answer>), running through West Rock, home to West Rock Park and the Three Judges Cave.
What is the name of the highway tunnel on Route 15 in New Haven? 
Heroes Tunnel