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The US 19/US 62 and PA 58/PA 258 multiplexes overlap for half a block in Mercer in Mercer County.
Heading west on PA 58 west/PA 258 north, which split here at the northwest corner of the square in Mercer. The signs in the background show PA 58 west heading right with US 19/US 62 north and PA 258 north following US 19/US 62 south to the left. PA 58 east also heads left, making this intersection the northern split of a one-way quadruplex, which lasts for half a block.
A courthouse stands in the middle of the Mercer square. Four routes run around the courthouse, creating several multiplexes. A half-block south of the previous photo's location, this view is from US 62 north/PA 258 south (a fourth duplex), and these two routes split here. To the right is the US 19/PA 58/PA 258 triplex, which runs from this intersection for half a block to barely off the right edge of the photo. To the left is US 19/US 62 north, and from the left is US 19 south/US 62 south/PA 58 east/PA 258 north. The other direction of PA 58/PA 258 runs around the square. PA 58 west does not actually use the street shown here, but ventures as close as a half-block to the left.
United States Route 19 joins PA 58/PA 258 for half a block in Mercer in Mercer County.
This view is from a half-block south of the intersection shown in the previous photo and looking north toward that intersection. The half-block in between carries US 19 south/PA 58 east/PA 258 south toward the camera and US 19 north along away from the camera. To the right is the beginning of the PA 58/PA 258 duplex, ahead to the left is the US 62/PA 258 duplex, and straight ahead two half-blocks away is the US 19/US 62/PA 58 triplex.
Pennsylvania Routes 58 and 258 join for a block through Mercer in Mercer County. Part of the duplex is joined by United States Route 19 in the US 19/PA 58/PA 258 triplex, and part of that triplex is joined by United States Route 62 in the US 19/US 62/PA 58/PA 258 quadruplex.
From US 19 south/PA 58 east/PA 258 south, PA 58/PA 258 turns east to continue around the courthouse in the middle of town.
A block to the east, PA 58 and PA 258 split apart. At the eastern split, the duplex changes relative directions. PA 58 east/PA 258 south heads east on the one-way street on the south side of the courthouse. At the southeast corner, mainline PA 258 meets the square. PA 258 south splits off to the south, while PA 258 north joins the square.
PA 58 east/PA 258 north then heads north for a half a block on the east side of the courthouse to this intersection. Here mainline PA 58 meets the square, where PA 58 east splits to the east and PA 58 west joins the square.
Here is the view from PA 58 west.
Continuing around the square, the duplex continues north on the east side of the courthouse to the northeast corner of the square. PA 58 west/PA 258 north makes a left turn.
Continuing to the northwest corner of the square, PA 58/PA 258 meets US 19/US 62, making the US 19/US 62/PA 58/PA 258 one-way quadruplex to the left and the US 19/US 62/PA 58 triplex to the right, completing the round-trip about the courthouse. (This is the same photo as the first photo on this page.)
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