There was recently Onnibus in Finland. They sold cramped two storey bus trips at very limited lanes. First ticked sold at 1e and price going up so that the last

There was recently Onnibus in Finland. They sold cramped two storey bus trips at very limited lanes. First ticked sold at 1e and price going up so that the last goes for 35e or something. Similar to cheap air travel schemes. You extract more accurate info as it's not just two price points but a curve of ticket-price/time. So far the result has been all bus services lowering prices, train tickets going lower too and overall people traveling more. It was needed price cut as some people we're switching to air travel as plane ticket was cheaper than train.