It wasn't a practical vehicle, but it was the first self-propelled vehicle to use steam power and run on land. However, the "Cugnot" was limited in range and speed and ultimately unsuccessful.
It's worth noting that Richard Trevithick of England also built a steam-powered carriage in 1801. His carriage was more successful and even carried passengers, but it is often overshadowed by the historical significance of Rivaz's invention.
