Route description Pennsylvania Route 21

pa 21 traveling west across old masontown bridge demolished in 2013.

in waynesburg, pa 21 one-way pair high street (west) , greene street (east). both streets 2 lanes in borough. high street arterial road through waynesburg s business district. while in waynesburg, shares route u.s. route 19. pa 21 leaves waynesburg entering census-designated place of morrisville. pa 21 becomes two-lane road shared left turn lane less mile before 19 leaves route , pa 21 stays east, becoming 4 lane divided highway. interstate 79 exit 14 pa 21 in morrisville signed pa 21 masontown , waynesburg. pa 21 leaves morrisville in jefferson township.

pa 21 travels east-southeast through rest of rural greene county. road level , countryside farmland. in paisley, pa 21 intersects pennsylvania route 88, becomes four-lane divided highway until crosses masontown bridge on monongahela river.

pa 21 enters fayette county in borough of masontown. bypasses masontown north , merges pa 166 (main st.). after leaving masontown, southernmost point on route, pa 21 becomes mcclellandtown road. turns northeast entering german township , leaving pa 166. passing through mcclellandtown, pa 21 traverses more densely populated western fayette county entering south union township. highway enters south union township in village of uledi. intersects dixon boulevard before entering city of uniontown. has interchange u.s. route 40/u.s. route 119 near cherry tree square. passes uniontown hospital before ending @ route 40 business (main st.).