An autonomous car designed by PSA Peugeot Citroën traveling in France. YouTube/ PSA Peugeot Citroën Four self-driving cars traveled the 360 miles between Paris and Bordeaux, France last Friday.

The cars were designed by PSA Peugeot Citroën, the second largest car manufacturer in Europe, as part of the Intelligent Transport Systems (ITS) World Congress. The ITS World Congress is the largest event for intelligent transport systems and services.

There was no driver involved for the entirety of French-made automobiles' trip. During the drive, the car was able adjust its speed and change lanes successfully.

In July 2015, PSA Peugeot Citroën was the first carmaker to receive authorization to carry out open road tests for four autonomous models, and 15 more for 2016.

PSA Peugeot Citroën plans to market its self-driving technology by 2020, according to their website. A driver will still be required to sit in the driver seat for these automobiles, but PSA Peugeot Citroën will begin working on cars that entirely relieve drivers of any responsibility after 2020.

The Vienna Convention requires that drivers are in control of their automobiles at all times, making PSA Peugeot Citroën's self-driving system illegal even if a person sits in the driver seat while the car runs. The website notes that there are currently discussions to renegotiate the convention and oversee the arrival of autonomous vehicles.

Watch the PSA Peugeot Citroën car drive itself: