一名调式员在出发前调整和谐号列车。拍摄于2012年10月23日，中国沈阳维修中心。

上班高峰期的列车站。拍摄于2012年7月11日，孟买教堂火车站。

一名工人走过马德里Atocha火车站。

一段老机车零件。拍摄于2012年11月5日，乌尤尼盐附近平坦的拉巴斯。

人们走过纽约市中央车站。拍摄于2012年11月1日。

节日期间，急于与家人团聚的回乡客。拍摄于2012年10月25日，达卡。

等火车的人们。拍摄于2012年11月6日，斯德哥尔摩。

列车上卖艺的小丑Hendri，他一天能赚取约合15.6美元。拍摄于2013年1月9日，雅加达。

女星扮古装招待乘客。拍摄于2013年1月13日，伦敦穆尔盖特站的蒸汽火车旁。

睡在火车上的仰光人。拍摄于2012年9月17日，缅甸仰光。

一个女人偶然加入到“无裤乘换地铁”活动中。拍摄于2013年1月13日，英国伦敦。

乘客步行在带有钢琴键盘设计图案的火车站走廊上。拍摄于2013年1月10日。

在铁路调控站停靠的货车。拍摄于2012年9月23日，德国。

工作人员监控纽约中央车站的火车交通运营状况。拍摄于2013年1月8日，美国纽约。

人们聚集在都灵火车站前的一场就职典礼。拍摄于2013年1月14日。

等待回家的印度人。拍摄于2013年2月10日，印度。

坐在轨道车顶部的人。拍摄于2013年4月29日。

A train is loaded with coal at the Borodinsky opencast colliery near the Siberian town of Borodino on November 15, 2012. The Borodinsky colliery is the biggest opencast coal mine in Russia - 4 miles long and 328 feet deep - and was built from 1945 to 1949

A train of the Harz Narrow Gage Railway runs to the summit of the Brocken, the highest mountain of the Harz, Germany on January 15, 2013. (Matthias Bein/EPA)

A Lego train passes through a model of the Tanjung Pelepas shipyard during a media preview of Legoland Malaysia in Nusajaya, Malaysia on September 14, 2012. (Edgar Su/Reuters)

Dave Patterson tinkers with a model train before the Model Rail Scotland exhibition on February 21, 2013 in Glasgow. (Jeff J Mitchell/Getty Images)

An employee holds a toy train during the London Toy Fair in Olympia, central London, on January 23, 2013. (Carl Court/AFP/Getty Images)

A train made of chocolate during a Guinness Book World record event ahead of the Brussels Week of Chocolate, entices at Brussels South station on November 19, 2012. The train by Andrew Farrugia of Malta is made of 1,285 kg of chocolate and is 34.05 meters

A vendor sorts vegetables next to a railway track as a train passes by, in Dhaka on September 10, 2012. (Andrew Biraj/Reuters)

Russia\

Passengers crowd a carriage on a train bound for Chengdu at a railway station in Shanghai on January 15, 2013. An estimated 224 million passengers travelled via trains during the Spring Festival. (Aly Song/Reuters)

A conductor checks tickets onboard the new evening commuter train on November 13, 2012 as it winds its way from Nairobi\

Mercedes Robinson and other members of the Victory & Deliverance gospel choir sing on the 2012 Alaska Railroad Holiday Train as it cruises along the Turnagain Arm to Indian and back to Anchorage, Alaska on December 1, 2012. (Bob Hallinen/The Anchorage Dai

The Le Burgeoise wagons of the A Line subway in Buenos Aires carry passengers on January 11, 2013 during the so-called last ride of the historic trains. Buenos Aires city Mayor Mauricio Macri decided to replace the fleet with Chinese-made wagons. The A Li

A model presents a creation during the \"Express Fashion\" catwalk show onboard the Dubai Metro on January 23, 2013. (Jumana El Heloueh/Reuters)

Lukasz Rostkowski, alias L.U.C (left) and Dominik Smuzny of Poland perform during \"Collecting & Breeding Human Time\" on the Cosmic Underground art train in Riga, Latvia railway station on September 24, 2012. Cosmic Underground is a multidisciplinary tra

A man rides a train on Tokyo\

Revelers wait for a subway train as they make their way to the Sambadrome for the first night of the annual Carnival parade in Rio de Janeiro on February 10, 2013. (Pilar Olivares/Reuters)

A commuter rides a train painted with murals promoting post-election peace in Nairobi on February 25, 2013. (Thomas Mukoya/Reuters)

Snow falls on Istiklal Avenue in Istanbul on January 7, 2013. (Bulent Kilic//AFP/Getty Images)

A tram runs in Lisbon on October 18, 2012. (Rafael Marchante/Reuters)

A man smokes a cigarette as he stands with his bike on a local train in New Delhi on November 8, 2012. (Kevin Frayer/Associated Press)

Students in traditional dress walk near a 1860\

A passenger peers from a train heading to the Once train station in Buenos Aires on January 28, 2013. (Natacha Pisarenko/Associated Press)

Miners Sakiba Colic (right) and Semsa Hadzo, coal technologists, ride a coal mine train during their 8-hour shift in the mine in Breza, Bosnia on January 16, 2013. (Amel Emric/Associated Press)

A Soyuz rocket is rolled out to the launch pad by train on October 21, 2012 at the Baikonur Cosmodrome in Kazakhstan. (Bill Ingalls/NASA/Associated Press)

A crane lowers a retired Blue Line subway car into the Boston subway\

People look at a giant drilling machine completing the 4 kilometer-long Saverne tunnel beneath the Vosges mountains in Eckartswiller, France during a ceremony on February, 25, 2013, as part of the second phase of construction works for the east European h

An urban explorer runs through an unguarded subway tunnel under construction in Toronto last year. The tunnel is part of a new extension being built in the city called the Toronto-York Spadina Subway Extension, and is expected to open by 2015. (Tom Ryaboi

Two train drivers shake hands after stopping at Gara de Nord station during a two-hour protest by railway workers over delayed salary payments in Bucharest on January 16, 2013. (Bogdan Cristel/Reuters)

A driverless vehicle, controlled by an advanced navigation system, arrives at the Personal Rapid Transport station at the Masdar Institute campus in Abu Dhabi in the United Arab Emirates. The United Arab Emirates introduced the world\

Railway workers clean a train in Bangalore on February 26, 2013. The railway, the country\