I recently saw this devilish machine on the road to Washington. It’s a road zipper, which moves concrete blocks in such a way as to change the number of lanes during rush hour, using the opposite lanes where traffic is significantly less. This is particularly effective on bridges, as you can’t easily widen the road there, creating a bottleneck (photo from the Roosevelt Bridge from our side in DC)
It was a revelation to me that this is not at all an innovation: barriers have been moved this way on this bridge for already 18 years. And another thing, there are magnetic guides under the asphalt to make it very easy for the drivers of these devices.
Hi, I'm Rauf Aliev. 