Line 51 is one of the oldest school lines. It was introduced with the 2002/2003 school year in response to a request from Jabloňová Primary School for safer transport of schoolchildren. The extent of operation has remained at one morning service throughout. Since 2018 the line 51 service has been a continuation of line 24 from Doubí sídliště.
Contributors: Boveraclub (historical records), Liberecká podniková (videos, proofreading), Tomáš Krupička Sr. (local facts) and others.
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