Three-Digit Interstates by FlaxmanR

Question 8

The Goethals, Verrazano Narrows, Triborough, and Bronx-Whitestone bridges, as well as the Brooklyn-Battery Tunnel, all carry triple-digit interstates that do not meet their parent two-digit interstate. What is this TWO-DIGIT interstate, which unlike its four child routes just barely crosses into New York when it terminates at the eastern end of the Holland Tunnel?