[jpalamar]

Originally Posted by ScubaSteve

The problem is that people are too stupid to pay attention while they drive and obey the traffic laws... I'm sure someone riding a bike is paying a lot more attention to what they're doing than someone driving a car is.

I think there is an equal percent of dumb car drivers as dumb bike riders.

See bike laws in Philadelphia:
Section 3501. Applicability of traffic laws to pedalcycles.
(a) General rule. -- Every person riding a pedalcycle upon a roadway shall be granted all of the rights and shall be subject to all of the duties applicable to the driver of a vehicle by this title, except as to special provisions in this subchapter and except as to those provisions of this title which by their nature can have no application.

Section 3508. Pedalcycles on sidewalks and pedalcycle paths.
(a) Right-of-way to pedestrians.-- A person riding a pedalcycle upon a sidewalk or pedalcycle path used by pedestrians shall yield the right-of-way to any pedestrian and shall give an audible signal before overtaking and passing a pedestrian.
(b) Business districts.-- A person shall not ride a pedalcycle upon a sidewalk in a business district unless permitted by official traffic-control devices, nor when a usable pedalcycle-only lane has been provided adjacent to the sidewalk.