[Civicsman]

Segway surely tried to get Electric Personal Assistive Mobility Device (EPAMD) laws passed in every state, but I do not think they were successful in all 50.

Here is the Illinois law (from the regulatory link at segway.com)

(625 ILCS 5/11-1005.1)
Sec. 11-1005.1. Electric personal assistive mobility devices. Every person operating an electric personal assistive mobility device upon a sidewalk or roadway has all the rights and is subject to all the duties applicable to a pedestrian. Nothing in this Section shall be deemed to limit or preempt the authority of any home rule or non-home rule unit of local government from regulating or prohibiting the use of electric personal assistive mobility devices.
(Source: P.A. 92-868, eff. 6-1-03.)

Note that it allows local communities to set their own rules, or even disallow the devices (apart from use by legally physically challenged people, where the federal ADA laws hold sway. Or used to... Under the current administration, who knows?)

The actual definition of an EPAMD is elsewhere in Illinois law, but since the law above is dated 2003, it's likely Segway had a part in this law. If so, it's likely that the definition is fairly standard; electric, two wheels, self-balancing, 12.5 MPH max. If the MiniPro fits the EPAMD definition, then it's legal in Illinois, where you have the rights and responsibilities of a pedestrian. (so probably no lights required?)

Regarding local laws, I'd call the Chambana police and ask.