ZiU-9

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ZiU-9, or ZIU-9 (Cyrillic: ЗиУ-9) is a Soviet (and later Russian) trolleybus. Other names for the ZiU-9 are ZiU-682 and HTI-682 (Cyrillic: ЗиУ-682 and ХТИ-682). The ZiU acronym stands for "Zavod imeni Uritskogo", which means a factory named after Moisei Uritsky, the Russian revolutionary. Before 1996 this acronym was also a trademark of the vehicle manufacturer Trolza. The ZiU-9 was first built in 1966, although it was only put into mass production in 1972 and it was still assembled along with other more advanced trolleybus vehicles in the Trolza (former ZiU) factory until 2015.^[1] The total number of produced ZiU-9s exceeds 42,000 vehicles making it the most produced trolleybus in the world. Many copies of the ZiU-9 were made in other factories of the former Soviet bloc.^{[citation needed]} Following the Soviet era, many cities still utilize the ZiU-9 as their primary trolleybus; for example Cheboksary, Ryazan, Vinnitsa and others. ^{[citation needed]}