Why being restricted to just one side of the road?
Not the people of Mexico, who are directed to change lanes on a steep, windy road on Route 150D between Orizaba, Veracruz and Tehuacán, Puebla.
So, you’re driving downhill, correctly on the right side of the road, and the arrow on the asphalt indicates you need to switch to the left side.
How confusing is that?
The point of this puzzling piece of public road is based on physics: by getting the cars climbing the hill to take the widest angle through tight corners, there’s less need to slow down and therefore less of a hold-up if you’re stuck behind a truck.
A Facebook video posted recently shows how terrifying the scenario could be if you don’t pay attention to the horizontal signage. I think it’s a great way to make drivers always focused on driving.