You need to know how to get from one place to the another, but you don’t have an Internet connection to get updated information.
A public transportation app that uses (and comes preloaded) many free wifi connection points around the world. Where ever you are you can get the most up to date public transportation information without the need to have an internet connection.
They are mostly board and need some distraction which is a good time to sell to them.
Build a local wifi network on the vehicles of the public transportation (tram, bus, etc.), incentivize the travelers to connect by giving them discounts, achievements badges, etc. Have special exclusive offers and content only available there. Monitor their behavior to personalize your communications with them. Share revenues with the transportation company.