Well, it doesn’t need signals or crossings because people can cross freely (unlike the US), the traffic speed is lower, and drivers know to look for pedestrians, cyclists and scooters … but Vietnam does lack decent public transport.

The flipside is that no part of the older cities is set up for public transport (hell, lots of houses are only accessible on foot or by scooter) and there’s little money for putting in infrastructure that can’t also help move freight - during rush hour that 10 lane road is 7 lanes of trucks and 3 of scooters.