11. Haldex Traction Systems was incorporated in BorgWarner TorqTransfer Systems. 12. The Illinois Traction System operated long after similar electric railroads in other areas had closed. 13. These were the first suburban trains in Sydney fitted with a multiphase alternating current traction system . 14. Mass production of four-wheel drive tractors, with original dual traction system , already conceived in 1928, begins. 15. This was done since KTM / KTP1 trams were not intended to work as multiple traction systems . 16. The 4MATIC system does not have mechanical differential locks, but an electronic traction system ( 4ETS ). 17. The ABB traction system uses a 6-pole brushless WGX560 synchronous alternator directly coupled to the CAT engine. 18. LUR focuses solely on the traction system of bogies, wheels and axels, wheelsets, gearboxes and final drivers. 19. Elkhart was a station on the Illinois Traction System , which was built through the village in 1904. 20. The first trainset to receive this upgrade, which included a replacement traction system , entered service in July 2015.