Carriages on Bangkok’s elevated Skytrain system are plastered with perforated advertising foil, letting folk on the inside look out, but not letting the folk on the platform look in.
Commercial considerations high on the list, shade and passenger comfort a distant second, but improved punctuality?
Light years away from the planners’ considerations.
But if you can’t see into the carriages as they pass you on the platform, you’re not tempted to scuttle down to an empty-ish car (together with every bastard and his brother…) and then scuttle back when you find out that their elbows are sharper than yours.
Which means that folk line up patiently, fairly evenly distributed over the platform and board as placidly as cows heading into the milking shed.
Doors close, off you go.