If it runs less often than every 15 minutes, then its not a major bus line, and your in a suburban slum. Or, possibly your local transit agency has decided lifeline service to the suburban slums/gricklegrass is more important than urban transit, in which case its time to get the management canned.

Serving suburban slums with mass transit will never provide effective transit, nor is it financially feasible for most of these areas to maintain their infrastructure long term, usually they are underwater 5x to 6x in terms of maintenance funds needed to keep the current level of infrastructure afloat.

Richer areas may be able to make it work past the 50 year mark for a few decades more, but poorer areas (Detroit, Flint, and good chunks of Texas) are literally letting their infrastructure fall to bits as the tax base can't support it.

https://www.strongtowns.org/journal/2017/1/9/the-real-reason...