Michigan actually leads the country in miles converted (even if the article shows Penn has a higher number of trails), but you are right, there are gaps. I ride on an old rail line which has been converted to a half dozen or so separate trails which are sometimes connected, but which also often just dead end at a trail head with the line on the other side of the road a jungly overgrown mess. Even though there are miles and miles of trails, you can't ride most them end to end for any significant distance without having to incorporate connections on city streets. Long term plan is for them to all be connected via the Michigan Air Line trail connecting Lake St Clair to Lake Michigan, but that is a long ways from realization.

https://www.washingtonpost.com/blogs...s-into-trails/