As used in this chapter:
A vehicle propelled solely by human power through a chain belt or gears that has at least one wheel more than 14 inches in diameter.
Any headset, radio, tape player, or other similar device which is designed to provide the listener with radio programs, music, or other recorded information through a device which covers all or a portion of both ears.
The portion of roadway used for the movement of a single line of vehicles. Unless otherwise indicated by traffic control devices, every undivided roadway on which lanes are not marked or on which the only pavement marking is a center line shall be deemed to be a two-lane street with one lane open for vehicular travel in each direction separated by the center line. The marked or unmarked portion of a street on which parking is permitted is not a separate lane for vehicular travel but is a parking lane.
A way publicly maintained that has been designated for use by bicycles only or by bicycles and pedestrians by a traffic control device or other sign or by regulation and that is separated from the roadway for other vehicular traffic by open space, a curb or another barrier.