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城門隧道 - 交通量
| 年份 |
交通量 (輛次) |
| 南行 |
北行 |
雙程合計 |
平均每日 |
| 1997 |
9,963,876 |
10,123,429 |
20,087,305 |
55,034 |
| 1998 |
9,752,478 |
9,841,764 |
19,594,242 |
53,683 |
| 1999 |
9,705,336 |
9,762,548 |
19,467,884 |
53,337 |
| 2000 |
9,903,248 |
9,933,616 |
19,836,864 |
54,199 |
| 2001 |
9,840,354 |
9,794,316 |
19,634,670 |
53,794 |
| 2002 |
9,972,093 |
9,941,663 |
19,913,756 |
54,558 |
| 2003 |
9,652,610 |
9,688,391 |
19,341,001 |
52,989 |
| 2004 |
9,724,351 |
9,792,780 |
19,517,131 |
53,325 |
| 2005 |
9,665,724 |
9,730,936 |
19,396,660 |
53,142 |
| 2006 |
9,648,578 |
9,631,553 |
19,280,131 |
52,822 |
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