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

Imagine a fantastical carriage of sorts, unlike any horse-drawn vehicle you have ever seen. It has no horses, yet it moves with great speed, so fast that it nearly seems to fly over the ground. This carriage has four round and robust wheels, and its body is sleek and elongated, designed to slip through the air like an arrow shot from a bow.The carriage, made of materials unfamiliar to your time, bears resemblance to metal but shaped with extraordinary craftsmanship and precision. Within it, sits a person, donned in a simple garb, operating this wondrous contraption by means not of reins but with a wheel and pedals to control its motion and speed.This strange vehicle races upon a series of stones laid flat and joined tightly together, forming a straight path, unlike the rough and oft uneven roads known to you. It is partaken in contests of speed, demonstrating the prowess of its design and the skill of its operator.Such a sight would surely be considered a marvel, a testament to man''s ingenuity and a glimpse into a world far beyond the age of carriages and horses.