Mernda residents are calling on the Andrews government to commit to a third new railway station in the area, amid concerns that the extension of the line from South Morang could include sections of elevated "sky rail".

A site near Marymede Catholic College has been chosen as the location of a secondary station between South Morang and the planned Mernda Station, off Bridge Inn Road.

The site was picked over a station near Hawkstowe​ Parade because of the greater availability of space for car parking combined with a strong community preference to be able to drive to the new station.

Concept plans revealed during a community consultation session on Saturday also showed elevated and underground opinions were being considered for rail crossings at Hawkstowe Parade in South Morang and Bridge Inn Road in Mernda.