In modern times, public transport, whether it is buses, trains, or taxis, makes long-term travel more convenient. Also in that same world, there are winged humanoids capable of actual flying, with obviously long wingspans. Like birds and other flying animals, some tend to get tired after a long flight, especially if they were carrying items.

Say if they want to perch on the bus without trouble. But like people here, they need to pay to ride whatever they're on. Obviously they can't go bus-surfing all over the place, as that's illegal. So what could be a convenient way for the hypothetical winged humanoids to ride on the top of the bus while following the same rules as grounded people?