Hi there. I think only u old know the proportion of trips hat are ok experience for your baby and those that are not ok. Sometimes it could be that they are cranky for a variety of reasons. There are a few things that you can try:
10 not sure how baby is being transported in the car or bus - if not in car seat, maybe u want to check if the baby is comfortable, straps too tight and if there is enough support for the baby. U can consider wearing baby in a wrap or a Carrie with baby facing inwards to u so that baby can feel more calm
2) you ca try to time ur trips, some times it could be their cranky hour as they are getting sleepy?
3) try to entertain baby
4) try white noise
If you have tried the above and still not getting a good success, you should consider bringing the baby to a pd. Reflux, tummy upsets, motion sickness can be a few possible reasons. Motion sickness is usually not observed in less jerky rides like mrt but yes in buses and cars