Is coming late for tutes really a big deal and how late are you until they mark you absent? It takes me a while to get campus and by public transport, especially when connecting trains the times are ridiculous, eg. when my train gets to Flinders, the train to uni just leaves which makes me ~10 mins late when i get on the next one.
It varies between faculties and units; for example, in one of my tutes last year (in the Faculty of Medicine), if you were late by 20% of the total tute duration you were counted as absent (and tutes were a hurdle for this unit).
This is a question you should ask your tutor, but the response you'll most likely get is to coordinate your commute better (e.g. take an earlier train) so you get there early rather than late.