Dilara

Practical note for the specific genre this belongs to: images offered as proof that some infrastructure choice is possible are worth checking especially carefully, because the demand for them is high.

There are real examples of roads and buildings routed around trees, and there are also a lot of illustrations and renders circulating as photographs. The existence of genuine cases is exactly why the fabricated ones spread — the claim is plausible, so nobody feels a need to check it.

One check anyone can do before buying something in this category: look for what the seller says when asked directly, in writing, whether the buyer acquires a legally recognised title.

Sellers of genuine things answer plainly. Sellers of this kind of thing answer with more history. The difference is visible within one exchange and it costs you an email.

The evidence is unusually consistent across countries and study designs, and the key is that the total number of collisions falls modestly while the severe ones fall dramatically.

That split is the whole story, and it explains the gap between the data and local opinion.

The mechanism is geometric rather than behavioural. A conventional crossroads has a large number of points where vehicle paths cross, including head-on and side-impact conflicts at the full speed of the road. A roundabout removes those crossing points almost entirely — everyone travels in the same rotational direction, so the remaining conflicts are merging and diverging, at an angle, at low speed.

A side impact at speed is the collision type that produces the worst outcomes. Removing that category while adding some low-speed scrapes is exactly what the figures show: minor collisions may not fall much and can even rise, while serious injuries fall by a large margin.