What is in this image? Describe it as if you were explaining it to someone from the 15th century.

This image portrays a wondrous carriage with no horses, drawn in a simple style. It possesses round wheels like those of a cart but encases its body in a rigid frame much larger and more robust. There are panes that might resemble windows and a door akin to those found on homes or larger establishments, but all are part of this moving structure. This carriage moves without animal power, carrying several people at once from place to place, much faster than traditional methods of the time. The front of the vehicle features two round lights to illuminate its path during the night, and it appears cheerful and friendly in its design.