the dashboard are not route numbers – they are the stopping pattern of that service. This was implemented in July 1972, when Kim Il-sung sought to reduce traffic jams of trolleybuses, after trolleybus headways were decreased in 1 minute in April 1972.page:75 Fleet Most of the vehicles used on the system are North Korean made; some of them based on the Czech Karosa buses. The fleet also includes Hungarian Ikarus trolleybuses, imported as diesel buses and later reconstructed into trolleybuses. For the full list including vehicles in use in other cities, see Trolleybuses in North Korea. The only trolleybus operated in Pyongyang that was not manufactured by Pyongyang Trolleybus Factory was a single Jipsan-85 articulated trolleybus. New rolling stock New trolleybuses are also produced in other provinces and cities, such as in Chongjin. Despite the new technology incorporated with the new trolleybuses such as a dual power supply using a battery as a backup and LED displays, they do not have air conditioning. The new trolleybuses were subject to news coverage in the Rodong Sinmun, receiving multiple front page headlines subjecting the tests. Kim Jong-un also made visits to the Pyongyang Trolley Bus Factory, with the intention to turn the factory 'into a world-class trolley bus producer'. The first visit in February featured the Chollima-316 trolleybus, while the August visit featured the Chollima-321 trolleybus. In total, about 200 Chollima-091 were manufactured, about twenty Chollima-316 and at least 40 Chollima-321 were produced. See also List of trolleybus systems Pyongyang Metro Pyongyang tram system Trams and trolleybuses in North Korea Transportation in North Korea References External links Trolleybus city: Pyongyang (North Korea) at Trolleymotion (German, with automated translation to English and other languages available on-site) Map of Pyongyang Trolleybus. Transphoto. Transport in Pyongyang Pyongyang Pyongyang