Harold to New Rochelle

There are additional crossovers at Harold (MP 3.7), with Harold Tower on the west side and two bridges carrying the local and then express tracks of the 7 Subway (to Flushing) overhead, where the LIRR tracks turn away southeast and the Amtrak tracks turn north, double track, CTC, with overhead electrification and speed limit 60 mph for passenger trains and 40 mph for freights, past the bridge over the turnaround loop (three tracks) from the east side of the tracks into Sunnyside yard on the west side, LIRR Division Post (MP 4.5), where the LIRR tracks turn away southeast, Gate (MP 5.1), where the four-track line is heading just west of due north, with a signal bridge overhead and the LIRR freight branch from the cross-harbor float terminal at Bay Ridge Yard, Brooklyn, trails in from the southeast (i.e., on the east side), with one track passing beneath and two others on the north side of the line, with five bridges overhead during the turn, some of them carrying elevated Subway tracks.

There are twelve bridges over streets below on this elevated section of line, a bridge over a street and subway line, Sunnyside Junction (MP 5.4), where there are crossovers and the line is heading northwest, fourteen more bridges over streets, then over Hell Gate Bridge onto a small island in the East River, turning northeast (passenger speed 50 mph on the curve) past the water treatment plant on the ground below and a bridge over a street,  and bridging across the Harlem River on a through-truss bridge onto the mainland. On the mainland, the line bridges over (still on the river bridge) the former location of the New Haven connecting tracks (some of them still extant) to the erstwhile Harlem River Yard, then passes a location where a connecting track once trailed in on the west side, elevated Subway tracks on the west side (the 6 line to Pelham Bay Park) and ten more bridges over streets.

Another connecting track once bridged overhead, and a road bridge overhead,  just before the line reaches the former New Haven Oak Point Yard, on the west side (with eight yard tracks to the east), where a former NYC track from Melrose Avenue trails in on the west side, and the line turns north-northeast (passenger speed 40 mph on the curve), past MP 10, where the speed limit rises to 70/40, ten road bridges overhead as the line runs in a cutting with stone retaining walls, turning northwest alongside an inlet, with the 6 Subway Line bridging overhead, at a location where the New Haven Hunts Point Yard once trailed in, past six road bridges overhead, a street alongside to the east, a bridge over a street, a road bridge overhead, and a bridge over a street, turning north and bridging over the inlet on a through-truss bridge.

The line turns curvily northeast (with passenger speeds variously 60 and 65 mph on the curves) past a road bridge overhead, the former location of the erstwhile New Haven Van Nest Shops, two wide road bridges overhead, Intermediate Signals, Baychester, where the line turns north-northeast, a curve with speed limit 45/30 on the curve, a waterway alongside to the east, a through-truss lifting bridge at Pelham Bay (MP 15.5) over a much larger inlet, where the overall speed limit rises to 100/40, a curve with speed limit 45/30 on the curve, a road bridge overhead, Intermediate Signals, a bridge over a street, three underbridges with passenger speed limit 80 mph, a golf course to the east, two bridges over the golf course, and a turn to the north. At two places along this line there are closed stations with demolished platforms.

There are signals and crossovers, four bridges over streets, a curve at MP 18 (passenger speed limit 70 mph on the curve), detectors at MP 18.4, a Tower on the east side at the Metro-North Division Post (MP 18.8), where the line passes from Amtrak to Metro-North ownership, an electronics box at LOC B, and CP 216 (MP 18.9), formerly Shell Tower, in New Rochelle, where the double track line trails into the south side of the original New Haven four track route from Grand Central, heading northeast, with speed limit 15/10 on any turnout movements.