Coincidentally, a 2.0 - litre turbo flat «six» from a 911 had been tested on the bench also in 1969, but it was not until early 1973 that road trials began with a 2.7 - litre engine boosted by a single turbocharger.
Mazda begantrials on public roads using ITS * 5 in September 2013 and the system was demonstrated at the 20th ITS World Congress Tokyo 2013 held earlier in October.