Bicyclists must:

 

• PA law requires a person under the age of 12 to wear an approved helmet when riding a bicycle.
• Obey any local laws or regulations concerning helmet use for adults.
• Bicycles are considered vehicles under PA laws and must obey all the rules of the road which applys to vehicles. The "rights" refer to the road way space required to operate the bicycle in a safe,lawful manner.
• Ride in a bicycle lane, if a usable one is available. Where there is none, the bicyclist must ride near the right curb or edge of the road, or on a usable right shoulder of the road, to avoid undue interference with other traffic. The rule of staying to the right does not apply when a bicyclist or in-line skater is preparing for a left turn or must move left to avoid hazards.
• Bicycles may ride in the left lane of a one-way street which contains two or more lanes. 
• Come to a full stop before entering a roadway from a driveway, alley or over a curb.
• Never travel with more than two abreast in a single lane.
• Never ride on a sidewalk if local laws prohibit it.
• Never carry a passenger unless the bicycle has a passenger seat.
• Keep at least one hand on the handlebars at all times, and not carry anything which interferes with proper control of the bicycle.
  

 

Bicyclists also must:

Signal turns, lane changes and stops using the hand signals shown. A bicyclist may signal a right turn by extending the right arm straight out to the right, instead of using the standard signal for car drivers. Never carry an infant under a year old as a passenger. It is against the law. The law also requires child passengers one through four years old wear approved bicycle safety helmets and ride in securely attached bicycle safety seats.   Night Riding: Every bicycle used when in use between sunset and sunrise must have a headlight which emits a beam of white light visible from at least 500 feet (150 m) ahead and a red taillight visible from at least 500 feet (150 m) behind. A bicycle sold by a dealer must have wide-angle, spoke-mounted reflectors or reflective tires, a wide-angle rear reflector and pedal reflectors.