In which of the following locations is making a U-turn STRICTLY PROHIBITED?

1. At intersections that carry no turn-restriction sign or marking.
2. On pedestrian crossings, in tunnels, on and under bridges, flyovers and viaducts, at railway crossings, on stretches carrying public transport stopping points, where visibility is under 100 metres in at least one direction, and on one-way roads.
3. On four-lane divided avenues that have a dedicated left-turn green arrow.
4. Anywhere outside built-up areas, because rural U-turns are always unsafe.