Metro station

The metro station is an underground public transport that utilizes the metro system. It is unlocked by meeting the Big Town milestone.

Description
Traveling underground at high speeds while avoiding the stress of traffic is an excellent choice when thinking mass transit in the city center. Place metro stations first, connect them with tunnels and then plan routes.

At first, your metro may not be a big hit in your city but one way to make it major is to sadly take some main bus routes out first. Please be aware that underground roads can't cross over metro tunnels.

An International Airport already includes one inside it. Metro Stations are just around as 'cheap' as buses.