是的，比起其他交通工具，地铁确实需要更高质量的铁轨。
地铁铁轨选材更讲究些。[{'character': '地', 'pinyin': 'di4', 'highest pitch': 10.67, 'lowest pitch': 8.73, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '铁', 'pinyin': 'tie3', 'highest pitch': 9.34, 'lowest pitch': 6.05, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '铁', 'pinyin': 'tie2', 'highest pitch': 10.53, 'lowest pitch': 6.05, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '轨', 'pinyin': 'guei3', 'highest pitch': 9.58, 'lowest pitch': 4.84, 'duration': 0.3, 'prosody hierarchy': '#2'}, {'character': '选', 'pinyin': 'xvan3', 'highest pitch': 7.81, 'lowest pitch': 5.02, 'duration': 0.29, 'prosody hierarchy': 'null'}, {'character': '材', 'pinyin': 'cai2', 'highest pitch': 6.59, 'lowest pitch': 5.48, 'duration': 0.27, 'prosody hierarchy': '#1'}, {'character': '更', 'pinyin': 'geng4', 'highest pitch': 10.53, 'lowest pitch': 8.4, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '讲', 'pinyin': 'jiang3', 'highest pitch': 8.4, 'lowest pitch': 4.09, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '究', 'pinyin': 'jiou5', 'highest pitch': 9.51, 'lowest pitch': 4.46, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '些', 'pinyin': 'xie1', 'highest pitch': 9.34, 'lowest pitch': 6.6, 'duration': 0.26, 'prosody hierarchy': '#4'}]