Northern Irish black taxis used to use this basic idea sans the technology. You'd typically get in to a taxi, ask what direction it's going, and if it was going

Northern Irish black taxis used to use this basic idea sans the technology. You'd typically get in to a taxi, ask what direction it's going, and if it was going roughly where you wanted, you'd wait until it had filled up with other people going in the same direction. As you'd imagine, getting from the centre of town back home was fine, but it didn't quite work the other way. Making this process more flexible by adding technology is a great idea, though it'd depend on the demographic of people who'd want a service like this and whether they actually have smartphones.