YanBike velomobile from Nederland

After endless fine-tuning and perfecting, Jan van Zelderen has finally finished his unique four-wheeler full of smarts.
A special four-wheel steering, as with a 'soapbox' and front-wheel drive.
With one silencer in the back and in the last few years also cleaned with one silencer in front, very comfortable. The vehicle adapts very well to a very irregular terrain. The front axle can only make a horizontal turn, so it is fixed vertically, but the rear axle can move both horizontally and vertically. The front axle is connected diagonally with two cables to the rear axle, which allows the four-wheelers to stay in contact with the underground even on a very irregular road surface. Due to the four-wheel control, a small wheel rash is enough for a small circle. Not a difficult "Akkermann control", but like a soap box control, also behind! The front axle is driven, but it can also be controlled with feet, like some front-wheel-driven bicycles.
The principle of the YanBike is a double "mill control".
Голландский четырехколесный велосипед с передним приводом.

[@YurkerYT]

Very interesting idea, as long as you don't go too fast i think this is ideal when you need a very tight turning radius.