New London/Groton to Providence

From the junction with the Central Vermont on the east side at Shaws Cove (MP 122.5), the road crossing at Bank Street (MP 122.5), the road crossing at State Street (MP 122.8), the passenger station at New London (MP 122.9), and the road crossing at Governor Winthrop Boulevard (MP 123.0), turning north-northwest and climbing as it turns east to the multi-span through truss movable bridge across the CV line and then the Thames River and the wye junction with the Providence & Worcester's Norwich Line on the north side at Groton (MP 124.2), the double track, CTC, overhead electrified Boston line spawns a short segment of extra track (Track 4), with speed limit 60/30 on Track 1, 60/35 on Track 2 and 30/25 on Track 4, and turns south-southeast, past MP 127.0, where the speed limit rises to 70/40 on Track 1 and 70/50 on Track 2, detectors at MP 127.8, and Palmers Cove (MP 128.1), where a spur to Soneco Quarry heads away southwest, Track 4 ends and the freight speed limit rises to 45 mph on Track 1 and drops to 35 mph on Track 2.

The line turns northeast, past Noark, bridges over an inlet and turns south-southeast and then east, past a road crossing at School Street (MP 131.2), northeast past West Mystic and the movable bridge at Mystic River (MP 131.9), southeast past the passenger station at Mystic (MP 132.3), where the freight speed limit rises to 50 mph and a road crossing at Latimer Point Road (MP 133.4), east past Lord (MP 134.8), a bridge over another inlet, a road crossing at Wamphassuck (MP 134.9), Stonington, a road crossing at Walkers Dock (MP 136.6), and a road crossing at Freemans (MP 136.7), and just north of due east, past MP 137.0, where the passenger speed limit rises to 80 mph on both tracks and the freight speed limit drops to 40 mph on Track 1, a road crossing at Palmer Street (MP 140.6), the Connecticut-Rhode Island line (MP 141.1), the passenger station at Westerly (MP 141.3), and High Street (MP 141.7), where the freight speed limit drops to 20 mph on Track 1, turning east-northeast past MP 142.0, where the freight speed limit on Track 1 rises to 50 mph.

The passenger speed limit rises to 85 mph on both tracks and the freight speed limit drops to 45 mph on Track 1 at Bradford (MP 146.0), as the line turns northeast, past Wood River Junction (MP 150.0), where a line to Hope Valley once headed north, Shamrock, MP 152.0, where the speed limits change to 80/50 on Track 1 and 80/45 on Track 2, Kenyons, where the line turns north-northeast, detectors at MP 154.3, MP 155.0, where the passenger speed limit on Track 1 rises to 100 mph, Kingston (MP 158.1), where the speed limits on Track 2 rise to 100/50, a road crossing at Wolf Rocks Road (MP 160.3), a turn just east of due north, MP 161.0, where the passenger speed limit rises to 110 mph on Track 1, Slocum, MP 163.0, where the passenger speed limit drops to 100 mph on Track 1 and rises to 110 mph on Track 2, Wickford Junction, where a line once trailed in from the east, MP 168.0, where the passenger speed limit on Track 2 reverts to 100 mph, and Davisville (MP 168.3), where the speed changes to 90/40 on Track 1 and 95/40 on Track 2, and a line from the US Navy Construction Battalion Base trails in on the east side.

The line turns just west of due north at East Greenwich (MP 171.7), where speeds change to 85/50 on both tracks, past Apponaug, where it turns just east of due north again, MP 175.0, where the passenger speed rises to 90 mph on Track 1 and 110 mph on Track 2, detectors at MP 175.3, Green (MP 175.5), MP 176.0, where the passenger speed on Track 1 rises to 110 mph, Mills Grove, where a line to Pontiac once headed west, MP 178.0, where the passenger speed on Track 2 drops to 90 mph, Norwood, where a line from Howard once trailed in on the west side, MP 180.0, where the passenger speed on Track 1 drops to 90 mph, Cranston (MP 181.2), where a line to Bellefont once headed east and  speeds on both tracks drop to 50/30 as the line turns just west of due north, a line from the harbor trailing in on the east side, a turn just east of due north at Arlington where a line once trailed in on the west side, a location where a branch to Olneyville once headed west, Atwells (MP 184.2), where the line turns just north of due east and a branch once trailed in from the northwest, the passenger station at Providence (MP 185.1), and the junction at ORMS (MP 185.6) with the Washington Secondary Track and the Providence & Worcester Main Line, heading east, as the Boston line turns north.