A free bike sharing program debuted in Louisville Kentucky then brought into national prominence at the 2008 Democratic and Republican national conventions. Information can be found at www.freewheelinwaytogo.com
Can be used as a proper noun to refer to the program or can be modified to apply to a freewheelin advocate. Such individuals are called freewheelers. It can also be used as a verb.
Man, I had an awesome time freewheelin at the Democratic convention.