Originally Posted by benjdm

Technically, that gives bicycle riders the duties and responsibilities of a person operating a vehicle, but does not define bicycles as vehicles.

From the Indiana code, definitions:

IC 9-13-2-196
Vehicle
Sec. 196. (a) "Vehicle" means, except as otherwise provided in this section, a device in, upon, or by which a person or property is, or may be, transported or drawn upon a highway.
(b) "Vehicle", for purposes of IC 9-14 through IC 9-18, does not include the following:
(1) A device moved by human power.
...

To my knowledge, my state (NY) is the same.