Editing Highway system in Taiwan (section)

=== Ordinary Provincial Highways ===
* [[Provincial Highway 1 (Taiwan)|1]] ([[Taipei]] - Fenggang, Pingtung): This is the historical north–south highway (縱貫公路).
** 1A ([[Taipei]] - [[Taoyuan District]], [[Taoyuan City]])
** 1B ([[Daya District|Daya]], Taichung - Wangtian, Taichung)
** 1C (Changhua City bypass)
** 1D (Citong - Douliu)
** 1E (Kaohsiung - Houzhuang)
** 1F (Zhunan - Luzhunan)
* [[Provincial Highway 2 (Taiwan)|2]] (Guandu, Taipei - [[Su-ao, Yilan]]) (North Coast Highway)
** 2A ([[Jinshan District|Jinshan]], [[New Taipei]] - [[Taipei]])
** 2B ([[Taipei]] - [[Tamsui District|Tamsui]], [[New Taipei]])
** 2C ([[Nuannuan District|Nuannuan]], [[Keelung]] - [[Daxi, Yilan]])
** 2D (Badu, Keelung - Rueibin, New Taipei)
** 2E (Wujie - Su'ao)
** 2F (Dawuluan, Keelung - [[Port of Keelung|Keelung Harbor]]): An extension of Freeway 3.
** 2G (Toucheng, Yilan)
* [[Provincial Highway 3 (Taiwan)|3]] ([[Taipei]] - [[Pingtung City]])
** 3A ([[Caotun, Nantou]] - [[Nantou City]])
** 3B ([[Daxi District|Daxi]], [[Taoyuan City]] - Shimen Dam
** 3C (Zhushan, Nantou - Jiji, Nantou)
* [[Provincial Highway 4 (Taiwan)|4]] ([[Dayuan District|Dayuan]], [[Taoyuan City]] - [[Shimen Reservoir]])
* [[Provincial Highway 5 (Taiwan)|5]] ([[Taipei]] - [[Keelung City]])
** 5A (Zhangshuwan, New Taipei - Liudu, Keelung)
** ''5B (Xizhi bypass)'': Decommissioned in 2013.
* [[Provincial Highway 6 (Taiwan)|6]] (Houlong, Miaoli - Dahu, Miaoli)
* [[Provincial Highway 7 (Taiwan)|7]] ([[Daxi District]], [[Taoyuan City]] - [[Zhuangwei, Yilan]]): (Northern Cross-Island Highway, 北部橫貫公路)
** 7A (Qilan - Lishan)
** 7B (Sanxia, New Taipei - Fuxing District, Taoyuan)
** 7C (Datong, Yilan - Wujie, Yilan)
** 7D (Shuanglianpi, Yuanshan - Yilan)
* [[Central Cross-Island Highway|8]] ([[Dongshi, Taichung]] - [[Taroko National Park|Taroko]], Hualien) (Central Cross-Island Highway, 中部橫貫公路): This highway was severely damaged between Guguan and Deji by the [[1999 Jiji earthquake]] although the Guguan-Lishan section opened to limited traffic in 2018.
** 8A (Baxin - Deji): This highway was severely damaged in the 1999 Jiji earthquake and has been shut down since.
* [[Provincial Highway 9 (Taiwan)|9]] ([[Taipei]] - Fenggang, Pingtung): The highway runs through the eastern part of [[Taiwan]]. It is the longest highway in Taiwan.
** 9A ([[Xindian District|Xindian]], New Taipei - [[Wulai District|Wulai]], New Taipei)
** 9B (Beinan-Taitung City bypass)
** 9C (Hualien - Shoufeng)
** 9D (Su'ao - Xiulin): old routing of PH 9.
** 9E (Daren - Shizi): old routing of PH 9.
** [[Suhua Highway Improvement Project|Suhua Improve]](Limited-access)
**[[South Link Highway]] Improve(Limited-access)
* [[Provincial Highway 10 (Taiwan)|10]] ([[Taichung Harbor]] - [[Fengyuan District]])
** ''10A (Daya-Shengang-Fengyuan)'': Absorbed into PH 10. 
** 10B (Qingshui - Shalu)
* [[Provincial Highway 11 (Taiwan)|11]] ([[Hualien City]] - [[Taitung City]]): (Hualien-Taitung Coastal Highway)
** 11A (Guangfu - Fengbin)
** 11B (Taitung City)
** 11C (Ji'an - Shoufeng)
* [[Provincial Highway 12 (Taiwan)|12]] ([[Taichung Harbor]] - [[Taichung]])
* [[Provincial Highway 13 (Taiwan)|13]] ([[Xiangshan, Hsinchu]] - [[Fengyuan District]])
** 13A (Zhunan - Miaoli City)
* [[Provincial Highway 14 (Taiwan)|14]] ([[Changhua City]] - Lushan, Nantou)
** 14A (Wushe, Nantou - [[Dayuling]], Hualien)
** 14B (Fenyuan, Changhua - Nantou City)
** 14C (Changhua City alternate)
** 14D (Fenyuan, Changhua - Nantou City)
* [[Provincial Highway 15 (Taiwan)|15]] (Guandu, Taipei - [[Hsinchu City]]): (Xibin Highway, 西濱公路)
** 15A (PH 15 to PH 61 in Dayuan, Taoyuan City)
* [[Provincial Highway 16 (Taiwan)|16]] ([[Mingjian, Nantou]] - [[Xinyi, Nantou]])
* [[Provincial Highway 17 (Taiwan)|17]] (Jianan, Taichung - Shuidiliao, Pingtung): (West Coast Highway)
** 17A ([[Annan District|Annan, Tainan]] - [[Hunei, Kaohsiung]])
** 17B (PH 17 to PH 17A in Annan, Tainan)
* [[Provincial Highway 18 (Taiwan)|18]] ([[Chiayi City]] - Tatajia, Xinyi): New Central Cross-Island Highway (新中橫公路) and Alishan Highway (阿里山公路)
* [[Provincial Highway 19 (Taiwan)|19]] ([[Changhua City]] - [[Tainan]]): Central Highway, (中央公路)
** 19A (Yanshuei, Tainan - Zihguan, Kaohsiung)
* 20 ([[Tainan]] - Haiduan, Taitung): [[Southern Cross-Island Highway]], (南部橫貫公路)
** 20A (Chulai - Chishang)
** 20B (Zuozhen - Nanhua)
* [[Provincial Highway 21 (Taiwan)|21]] (Dongshi, Taichung - Tatajia, Xinyi)
** 21A (ring road around Sun Moon Lake)
* [[Provincial Highway 22 (Taiwan)|22]] ([[Nanzih District|Nanzih, Kaohsiung]] - [[Gaoshu, Pingtung]]): Previously a portion of County Road 188 until 1993.
* [[Provincial Highway 23 (Taiwan)|23]] ([[Fuli, Hualien]] - [[Donghe, Taitung]])
* [[Provincial Highway 24 (Taiwan)|24]] ([[Pingtung City]] - [[Wutai, Pingtung]]), Wutai Highway (霧台公路): Was Highway 22 until 1993. A section in Wutai was severely damaged in 2009 by [[Typhoon Morakot]] and has been shut down since.
* [[Provincial Highway 25 (Taiwan)|25]] ([[Fongshan District]] - [[Linyuan, Kaohsiung]]): Fenglin Highway (鳳林公路)
* [[Provincial Highway 26 (Taiwan)|26]] (Fenggang, Pingtung - Daren, Taitung) Ping-E Highway (屏鵝公路) and Jia-E Highway (佳鵝公路)
* [[Provincial Highway 27 (Taiwan)|27]] (Laonong, Kaohsiung - Wunong, Pingtung)
** 27A (Liouguei to PH 28)
* [[Provincial Highway 28 (Taiwan)|28]] (Hunei, Kaohsiung - Liouguei, Kaohsiung)
* [[Provincial Highway 29 (Taiwan)|29]] (Namasia, Kaohsiung - Linyuan, Kaohsiung) Dalin Highway (達林公路): Was a portion of Highway 21 until 2014.
* [[Provincial Highway 30 (Taiwan)|30]] (Zhuoxi, Hualien - Changbin, Taitung)
* [[Provincial Highway 31 (Taiwan)|31]] (Luzhu, Taoyuan - Xinwu, Taoyuan)
* [[Provincial Highway 37 (Taiwan)|37]] (Xingang, Chiayi - Lucao, Chiayi)
* [[Provincial Highway 39 (Taiwan)|39]] (Xinhua, Tainan - Alian, Kaohsiung)
* [[Provincial Highway 61 (Taiwan)|61B]] (Shengang to national freeway 3, Hemei Interchange)
* [[Provincial Highway 63 (Taiwan)|63A]] (PH 63 to PH 14 in Caotun, Nantou)

==== Quasi Expressways ====
* [[Provincial Highway 63 (Taiwan)|63]] (South District, Taichung - Caotun, Nantou) (Zhongtou Highway, 中投公路)
* [[Provincial Highway 68 (Taiwan)|68A]] (controlled-access) (PH 68 to County Road 123)
* [[Provincial Highway 74 (Taiwan)|74A]] (controlled-access) (PH 74, Kuaiguan IC to PH 1 in Huatan, Changhua)