Underground long term advertising
No matter if you choose a partial or whole coverage , with the subway you are betting on a medium with high reach. In the main traffic times trains arrive every 4-5 minutes in the stations and are transporting 1.4 million people per day.
In Berlin there are two track options to choose from: U5 to U9 or U1 to U4. Choosing a specific line is not possible. The most frequented are the lines U2, U7, U6 and U9.
They are booked in units of two waggons which offers room for creativity. For the underground long term is understood as 12 months or more.