Pennsylvania State Route 18 is a north-south highway in Central Beaver County. In the northern portion of the county it runs along the Beaver River. PA St Rt 18 passes through the following towns in Beaver County. Frankfort Springs Monaca New Brighton
A BGS on WB I-76/PA Turn. A BGS on EB I-76/PA Turn. SB PA St Rt 18 south of I-76/PA Turn. SB PA St Rt 18 north of PA St Rt 551. SB PA St Rt 18 south of PA St Rt 551. SB PA St Rt 18 north of PA St Rt 251. SB PA St Rt 18 south of PA St Rt 251. SB PA St Rt 18 south of 31st Street. SB PA St Rt 18/WB PA St Rt 588 south of the Eastvale Beaver Falls Bridge. SB PA St Rt 18 north of 19th Street. SB PA St Rt 18 north of 15th Street. SB PAA St Rt 18 at 5th Street. SB PA St Rt 18 near 2nd Street. SB PA St Rt 18 at the Beaver River. SB PA St Rt 18/65 at 8th Street. A guide marker on SB PA St Rt 18/65. SB PA St Rt 18/65 at YMCA Drive. A guide marker on WB PA St Rt 68. A BGS on EB I-376. A BGS on EB I-376. A BGS on the ramp from EB I-376.
