lines under the river are numbered south to north, lines 1 and 2 running beneath 32nd Street and Lines 3 and 4 under 33rd Street. Eastward trains usually use lines 1 and 3, and westbound usually use lines 2 and 4. To bring the same-direction tunnels into adjacency, line 2 crosses beneath line 3 underground a few hundred feet west of the east end of the line 2 tunnel. East portals for Lines 1 and 3: East portal for Line 2: East portal for Line 4: Approaching Harold Interlocking from the west, the four tracks are Lines 1-3-2-4 south to north (with three LIRR tracks between Lines 2 and 3, and Sunnyside Yard approach tracks scattered between the passenger tracks). East of Harold, Lines 1-3 become LIRR Main Line Tracks 4-2 south to north, while Lines 2-4 become LIRR Main Line Track 3 and the westward Port Washington main. (Harold was rearranged in 1990; until then Lines 2-4 became the westward Port Washington and the westward Hell Gate track). Amtrak's Superliner fleet cannot use the tunnels due to the inadequate clearances, so Amtrak instead uses Amfleet and Viewliner sets. See also North River Tunnels (Hudson River tunnels to New Jersey) New York Tunnel Extension (construction project for East River Tunnels) References Tunnels in Manhattan Transportation buildings and structures in Queens, New York Crossings of the East River Pennsylvania Railroad tunnels Railroad tunnels in New York City Tunnels completed in 1910 Amtrak tunnels Long Island City 1910 establishments in New York City NJ Transit Rail Operations New York Tunnel Extension