This guide is for general information only and is not legal advice. Laws change — verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
The rule
Pennsylvania permits cyclists to ride two abreast on the roadway. 75 Pa.C.S. § 3505(b) expressly permits riding two abreast: "Persons riding bicycles upon a roadway shall not ride more than two abreast except on paths or parts of roadways set aside for the exclusive use of bicycles." Pennsylvania does not attach an impede-traffic qualifier in the two-abreast clause itself; the general slow-vehicle and right-hand-edge rules apply. See 75 Pa. Cons. Stat. § 3505 (Riding on roadways and pedalcycle paths).