U.S. 1 Business follows Lincoln Highway south of the freeway along U.S. 1 between Middletown township and Falls township in Bucks County. The route was established in 1986 when U.S. 1 was realigned northward to bypass Penndel and Oxford Valley. PA 413 overlaps with the bannered route east from Bellevue Avenue in Penndel to Veterans Highway just beyond the exchange with Interstate 295.
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| U.S. 1 Business northbound returns to U.S. 1 along an entrance ramp beyond the viaduct spanning Norfolk Southern and Penn Central railroad lines near Fallsington. 10/03/04 |
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| Removed by 2013, a Pennsylvania Turnpike trailblazer was previously posted along Lincoln Highway west near Glen Avenue in the borough of Penndel. 10/03/04 |
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| U.S. 1 Business (Lincoln Highway) south converges with the freeway along U.S. 1 at a wye interchange. 10/03/04 |
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| Old Lincoln Highway (SR 2037) branches southwest from the end of U.S. 1 Business into Bensalem township. 10/03/04 |
