Changan has recently set a record for the largest parade of autonomous cars, according to Guinness World Records. A total of 55 vehicles were driven autonomously at the automaker’s test facility in Dianjiang, China on November 28, 2018.

The convoy of CS55 SUVs took nine minutes and seven seconds to complete the 3.2 km course, travelling at 30 km/h, with each vehicle leaving no more than a two-car gap. Certain changes were made to the cars’ systems, including improved sensors that better detect lane boundaries and the position of the car in front. The aforementioned two-car gap used was also narrower than when compared to normal road conditions.

This was achieved by reducing the cars’ systems’ event detection and response because of the controlled environment having fewer variables than public road conditions. The most important point in the preparatory stages was to detect risk factors in advance, said autonomous engineer Ren Chuanbing. These included field personnel walking the course, as well as the placement of photography equipment.

Initially 56 cars took part in the record attempt, with the final count confirmed as 55 because one driver ended up taking control during the parade course. “The drivers who participated in the test had no contact with the autopilot system at all, so we should also build up their confidence in our system in a short period of time to let go of the controls,” said Changan autonomous car engineer Yang Guo.

“The artificial intelligence and new energy of automobiles is a very important trend in the future development of automobiles. As the world’s first brand to break this record, we will make more efforts in the field of intelligence,” said the executive vice president of Changan automobile, Tan Benhong.