§ 1234. Riding on roadways, shoulders, bicycle or in-line skate lanes
and bicycle or in-line skate paths. (a) Upon all roadways, any bicycle
or in-line skate shall be driven either on a usable bicycle or in-line
skate lane or, if a usable bicycle or in-line skate lane has not been
provided, near the right-hand curb or edge of the roadway or upon a
usable right-hand shoulder in such a manner as to prevent undue
interference with the flow of traffic except when preparing for a left
turn or when reasonably necessary to avoid conditions that would make it
unsafe to continue along near the right-hand curb or edge. Conditions to
be taken into consideration include, but are not limited to, fixed or
moving objects, vehicles, bicycles, in-line skates, pedestrians,
animals, surface hazards or traffic lanes too narrow for a bicycle or
person on in-line skates and a vehicle to travel safely side-by-side
within the lane.

(b) Persons riding bicycles or skating or gliding on in-line skates
upon a roadway shall not ride more than two abreast. Persons riding
bicycles or skating or gliding on in-line skates upon a shoulder,
bicycle or in-line skate lane, or bicycle or in-line skates path,
intended for the use of bicycles or in-line skates may ride two or more
abreast if sufficient space is available, except that when passing a
vehicle, bicycle or person on in-line skates, or pedestrian, standing or
proceeding along such shoulder, lane or path, persons riding bicycles or
skating or gliding on in-line skates shall ride, skate, or glide single
file. Persons riding bicycles or skating or gliding on in-line skates
upon a roadway shall ride, skate, or glide single file when being
overtaken by a vehicle.

(c) Any person operating a bicycle or skating or gliding on in-line
skates who is entering the roadway from a private road, driveway, alley
or over a curb shall come to a full stop before entering the roadway.