Startup Idea : In cab advertising

Would like to start in cab advertising with location sensors, normally people don't have anything to do while sitting in cab, we can setup leds which displays advertisements, adds will be interactive and device will also be connected to GPS which will display the partners add when the cab in passing close to the building, like Feeling hungry? Grab a subway in just 100m. Already working on it, looking for partners with experience in software development.