People like you are why the handicap stay that way.  I would love to get an electric bike for my  husband so he could ride with me and I see no reason why he should not be allowed to ride it wherever bikes go.  Are you next going to stop the motorized wheelchairs from going on the trails and sidewalks?   We don't have enough police force now to control what happens on the highways, don't give them another stupid law to enforce.  We need to get the law changed.