In any underground station there are stairs from the platform to intermediate storey and from there to the street naturally.
Since the people are watching where they step, stair advertising offers contact opportunities. The repetition of the advertising on the next step intensifies the memory effect of the advert.
For the choice of the right stairs you have a lot of options. The highest contact numbers are reached by the stairs directly from the platform. As all passengers have to pass through this way to the exits. The stairs to the streets have to share the total passenger numbers between them.
The medium costs per step is starting from € 20.00 per months. So a typical stair with 10 steps would be € 200.00 per months for media costs and additionally there are production costs. This is based on a one year contract.