How young is ur baby's first bus ride?

Hi every ka-nanays! Would like to ask if how old is ur baby's first bus ride? I might travel my 7month old baby via bus from edsa crossing to alabang only, though im kinda nervous that it's somehow bad to babies to travel at a young age since they r still fragile. I mean their head were too sensitive in terms of shaking possibly bec of humps or too shaky bus.. hope to hear from ur experiences! Thanks in advance! ??