Jiangtiao line

{{Short description|Suburban railway line in Chongqing, China}}

{{Infobox rail line

| box_width =

| name =

| other_name =

| native_name = 重庆市郊铁路江跳线

| native_name_lang = zh-cn

| color = {{rcr|CRT|jt}}

| logo =

| logo_width =

| logo_alt =

| image = JT015 at MetroTrans 2022 (20230427113828).jpg

| image_width = 300px

| image_alt =

| caption = CRRC Changchun CCD5051 electric multiple unit used by Jiangtiao Line

| type = Rapid transit

| system = Chongqing Rail Transit
Chongqing Suburban Railway

| status = Operational

| locale = Chongqing, China

| start = {{stl|CRT|Tiaodeng}}

| end = {{stl|CRT|Shengquansi}}

| stations = 7

| routes =

| daily_ridership =

| ridership2 =

| planopen =

| open = {{Start date and age|2022|8|6|df=yes}}

| yearcommenced =

| yearcompleted =

| close =

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| owner =

| operator = Chongqing Jiangtiao Line Rail Transit Operation Management Co., Ltd.

| character =

| depot =

| stock =

| linelength_km =

| linelength_mi =

| linelength = {{convert|28.22|km|mile|abbr=on}} (Tiaodeng – Shengquansi)
{{convert|4.6|km|mile|abbr=on}} (Shengquansi – Dingshan, under planning)

| tracklength_km =

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| tracklength =

| tracks = 2

| gauge = {{Track gauge|standard}}

| old_gauge =

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| minradius =

| racksystem =

| routenumber =

| linenumber =

| electrification = Overhead line with Multiple systems

• 25 kV AC (Jiulongyuan – Shengquansi)
• 1.5 KV DC (Tiaodeng – Shilinsi)

| speed_km/h =

| speed_mph =

| speed = {{convert|120|kph|mph|abbr=on}} (Peak)

| signalling =

| elevation_m =

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| website =

| map = {{CRT Line 5}}

| map_name =

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}}

Jiangtiao line of Chongqing Suburban Railway is a suburban rapid transit line in Chongqing, China.{{cite web|url=http://cq.sina.com.cn/news/m/2020-10-27/detail-iiznctkc7856024.shtml|date=2020-10-27|title=重庆轨道交通延长线江跳线开建 将采用新型快速车辆|archive-url=https://archive.today/20210926140625/http://cq.sina.com.cn/news/m/2020-10-27/detail-iiznctkc7856024.shtml|archive-date=2021-09-26}} The initial section of Jiangtiao line from Tiaodeng to Shengquansi opened on 6 August 2022.{{cite web|url=https://www.cq.chinanews.com.cn/news/2022/0804/39-37444.html|date=2022-08-04|title=单程28分钟 江跳线6日正式通车|archive-url=https://web.archive.org/web/20220806053416/https://www.cq.chinanews.com.cn/news/2022/0804/39-37444.html|archive-date=2022-08-06}}

This line had been known as the extension of Line 5 during its construction. Nevertheless, by the time it started operation, the color, train numbers and station codes of this line had all been separated from Line 5. Since November 30th, 2023, through operation between Line 5 and this line came into service.{{Cite web |date=2023-11-30 |title=重庆两条轨道交通线今日全线贯通运营  5号线穿过嘉陵江，10号线覆盖南坪商圈  江跳线与5号线实现贯通运营，江津可直达石桥铺 |url=http://www.cqjb.gov.cn/bm/qjtj_71914/zwxx_73796/dt/202311/t20231130_12632184.html |website=重庆日报}}

Jiangtiao line is also the first rapid transit line in China that supports auto-switching between AC and DC sections without dropping pantographs down. Switch actions are performed at a dead section east of Zhongliangshan Tunnel.{{cite web|url=https://epaper.cqrb.cn/cqrb/2022-08/03/006/content_rb_304298.htm|date=2022-08-03|title=关注首条市域（郊）铁路——江跳线特别报道：江跳线"黑科技"大揭秘|accessdate=2022-08-06|website=Chongqin Daily|page=6|author1=Yang Yongqin|author2=Liao Xuemei}}