Township and passes over Norfolk Southern's Norristown Line and wooded Barbadoes Island before heading over more of the river and into Upper Merion Township. From here, northbound US 202 crosses Lafayette Street and becomes one-way with two lanes of traffic on Dekalb Street, passing businesses in the downtown area of Norristown, where it crosses Main Street and Airy Street. Southbound US 202 heads southwest into commercial areas in downtown Norristown along Markley Street, a three-lane road with a center-left turn lane, running to the east of the terminus of the Manayunk/Norristown Line at the Elm Street station at Elm Street. At this point, the road begins to parallel the Manayunk/Norristown Line, widening to a four-lane divided highway between Elm and Marshall streets. Southbound US 202 crosses under Airy Street and passes to the east of the Main Street station along the Manayunk/Norristown Line at Main Street. Past downtown Norristown, US 202 continues northeast through urban residential areas with some businesses, following Dekalb Street northbound, which is one-way with two lanes of traffic, and Markley Street southbound, which is three lanes wide with a center turn lane. At the northern border of Norristown, southbound US 202 rejoins northbound US 202 at Dekalb Street; southbound US 202 splits from Dekalb Street by following Johnson Highway, a three-lane road with a center left-turn lane, northwest between Dekalb Street and Markley Street along the border between Norristown to the southwest and East Norriton Township to the northeast. From here, US 202 heads northeast into East Norriton Township along two-lane undivided Dekalb Pike, passing through suburban residential neighborhoods and running through the community of Grand View Heights. The road continues into business areas and passes to the southeast of Suburban Community Hospital, widening into a four-lane divided highway and coming to an intersection with Germantown Pike. The route becomes a three-lane road with a center left-turn lane before it narrows to two lanes and runs through wooded residential neighborhoods. US 202 reaches a junction with Township Line Road in the community of Washington Square, at which point it crosses into Whitpain Township. The road gains a center turn lane and passes businesses, intersecting Swede Road. The route continues past a mix of residential and commercial development and comes to a bridge over the Pennsylvania Turnpike Northeast Extension (I-476). US 202 narrows to two lanes and reaches an intersection with PA 73 in the community of