From the junction at Walk (MP 41.3), with the 1984 replacement tower in the vee of the junction, where the Danbury Branch turns away northeast, the main line continues east-northeast, four track, CTC, with overall speed limit 70 mph for passenger trains and 40 mph for freight trains, past two bridges over streets, the drawbridge (45/30 on the bridge) over an inlet, two bridges over streets, the passenger station at East Norwalk (MP 42.1), with a platform on the south side, a bridge over a street, and a platform on the north side, where the overall passenger speed limit rises to 75 mph, a road bridge overhead, the passenger station at Westport (MP 44.2), with two side platforms, the deck girder drawbridge at Saga (MP 44.3), with speed limit 40/30 on the bridge, two road bridges overhead, a bridge over a stream, two road bridges overhead, the passenger station at Green's Farms (MP 47.2), with two side platforms, a bridge over a stream, a bridge over a street, and the passenger station at Southport (MP 48.9), with two side platforms.
There is an 's' curve with maximum passenger speed 70 mph from MP 49.3 to MP 49.6, a bridge over a street, two road bridges overhead, a bridge over a river, two bridges over streets, a street alongside to the south, the passenger station with two side platforms at Fairfield (MP 50.6), a street alongside to the south, a bridge over a street, three road bridges overhead, MP 52.5, where the overall passenger speed limit drops to 70 mph, I-95 bridges overhead, seven bridges over streets, MP 54.7, where a 30 mph speed limit starts, an I-95 road bridge overhead, five bridges over streets, crossovers at CP 255 (MP 55.3), a turn northeast, I-95 bridging overhead, the passenger station with two side platforms at Bridgeport (MP 55.4), a turn east, and a bridge over a river at Peck Tower (freight speed limit 10 mph on the bridge), where the old tower still stands on the south side.
The passenger speed limit rises to 50 mph (and freight reverts to 40 mph) at MP 56.0, and the passenger speed limit rises to 60 mph at MP 56.5, past crossovers at CP 257 (MP 56.8), MP 57.0, where the overall passenger speed limit rises to 75 mph, ten bridges over streets, a Metro-North maintenance facility with eight tracks on the south side, a turn east-northeast, two bridges over streets, a bridge over an angled street, a bridge over a street, the passenger station with two side platforms at Stratford (MP 59.0), two road bridges overhead, a bridge over a street, and the through-truss drawbridge at Devon (MP 60.7), 40 mph on the bridge, followed by the wye junction (60 mph passenger speed on the junction) where the Waterbury Branch turns away north and the main line continues east-northeast.