Category:2021 in tram transport in Serbia
Countries of Europe: Austria · Belgium · Czech Republic · Denmark · Finland · France‡ · Germany · Greece · Hungary · Italy · Luxembourg · Netherlands‡ · Poland · Portugal‡ · Romania · Russia‡ · Serbia · Spain‡ · Sweden · Switzerland · Turkey‡ · Ukraine · United Kingdom
‡: partly located in Europe
‡: partly located in Europe
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