Bus profitability

[Baldy's Boss]

As 1/1/2051 approaches the Little Old World Red Railroad has bought a competitor to boost the station and vehicle counts,but that company came with two bus routes,both of which I have expanded to address large passenger backlogs...but I find that certain vehicles on the Baford bus line (never the other one) veer into unprofitability for part of every year.This slashes my ratings because I have no good "minimum profit".
What needs doing to get all the vehicles profitable?

[The Growl]

I think the problem is that you haven't timetabled your vehicles. If you control click start date under timetable after autofilling the travel times, (Waiting 3 days is usually good), you'll have them all spaced out. Make sure that they're starting the same location with adequate time to reach the first stop too.
You'll find if you have too many vehicles over too little stops, the buses will bunch up.