av在线一_avtt亚洲_91干网_男操女免费看_国产精品羞答答_国产三级A三级三级

Welcome to Aigre?

more>>Industry Overview

News

Understand Urban Rail Transit 2
addtime:2022-02-15click:383


Section 2: Development of urban rail transit worldwide

The rise of urban rail transit can be attributed directly to severe traffic congestion. Take Beijing as an example; the average speed of cars on main roads has halved compared to a decade ago and continues to decline by 2 km/year. Bus speeds have also plummeted from 40 km/h in the 1960s to just 10 km/h today. Without alternative transportation, urban traffic would soon collapse. Fortunately, metro, light rail, and other forms of rail transit have emerged as key solutions, saving cities from this dire situation.

Since the construction of the first metro in London over 130 years ago, urban rail transit technology has continuously evolved, diversifying into light rail, trams, monorails, and more. In 1890, London opened the world's first electric metro line, followed by Chicago's steam-powered metro in 1892 (electrified three years later). Paris's metro debuted in 1900, and Berlin's in 1902. Tokyo, Moscow, and others soon followed, with Moscow's metro becoming renowned for its artistry and world-leading passenger volume (3.2 billion annually). Beijing's metro opened in 1969, Tianjin was the second city to build one, and Shanghai the third. Today, China's million-plus cities are constructing or applying for metro systems, greatly benefiting residents' commutes.

Light rail, next to metro in significance, originally referred to trams. The world's first tram appeared in Virginia, USA, in 1888, and within three decades, 370 American cities operated trams. China wasn't far behind; Beijing, Shanghai, Tianjin, and others saw a tram boom in the early 20th century. However, as cars became more prevalent, trams faded away. Modern advancements have revived trams as clean, eco-friendly, and swift transportation, favored by many cities. Modern trams now operate in Dalian, Changchun, Tianjin's Binhai New Area, etc. The contemporary concept of light rail, distinct from modern trams, offers capacity between metro and trams, often appearing as elevated lines in cities. Notable domestic light rail systems include Shanghai's Pearl Line and Tianjin's Jinbin Light Rail.

Monorail, often called the "sky train," runs on a single track, either straddling or hanging from it. This unique mode of transportation dates back to 1821 in the UK, initially used for horse-drawn carts at docks. France launched its straddle monorail in 1888, and Germany invented the suspended monorail in 1893. Due to its low capacity, slow speed, and high technical requirements, monorail hasn't gained global popularity. China's first monorail opened in Chongqing in 2004.


主站蜘蛛池模板: 日韩一区二区三区四区区区 | 2024你懂的网站无码内射 | 欧美激情一区二区三区 | 国产精品无码人妻系列AV | 青青爽无码视频在线观看 | 日本黄色片在线观看 | 国产91在线播放九色000 | 日韩高清在线观看 | h视频在线播放 | 中文字幕人妻偷伦在线视频 | 97影院在线免费看 | 夜夜操影视| 亚洲精品污一区二区三区 | 免费无码一区二区三区蜜桃 | 欧美日韩视频无码一区二区三 | 精品久久久亚洲 | 亚洲不卡中文字幕无码 | 偷偷干夜夜拍 | 一级片短视频 | 欧美丰满熟妇bbbbbb百度 | 欧日韩不卡在线视频 | 成人毛片黄色 | 亚洲AV乱码一区二区三区香蕉 | 国产午夜精品免费一区二区三区 | 日韩精品无码一本二本三本色 | 91看剧| 国产视频午夜 | 女警一级毛片免费视频观看 | 欧美日本高清在线不卡区 | 大片网站久久 | 国产51人人成人人人人爽色哟哟 | 在线观看黄色 | 伊伊人成亚洲综合人网香 | 亚洲欧美日韩精品a∨ | 东京热制服丝袜无码专区 | com毛片 | h国产在线 | 好吊日好吊操在线 | 无线乱码一二三区免费看 | 日韩三级免费观看 | 90后小情侣出租屋内啪啪 |