we are at the riverside transport museum in glasgow and you can really see how things have changed overime. one thing that's changing is the way we pay for public transport. many of us are ditching paper money and tickets and instead using smartphones or, like you, smartwatches to pay for our journey. i never carry cash but one time i went to pay for this at a shop and i didn't have it on. it was a bare wrist, so embarrassing. but for the bus or london underground, it's easy. things might get easier with smart ticketing, which would spell the end for ticket barriers. instead, sensors will talk to an app which tracks your journey and automatically charges you. one system using bluetooth beacons is already active in genoa and paul carter has been to take a look. our cities are changing. and so the way we we navigate them is changing too. in many major cities around the world, technology being used for integrated fares and ticketing across modes of transport are now commonplace. but making such multimodal systems truly frictionless by removing the need to buy tickets is taking things to th