Hong Kong Chief Executive Carrie Lam speaks the opening ceremony of the Hong Kong Section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link, in Hong Kong, China September 22, 2018. REUTERS/Tyrone Siu 

Brazilian truck drivers block the BR-116 highway with their trucks during a strike in Curitiba, Brazil May 21, 2018. REUTERS/Rodolfo Buhrer 

Brazilian truck drivers block the BR-116 highway with their trucks during a strike in Curitiba, Brazil May 21, 2018. REUTERS/Rodolfo Buhrer 

Brazilian truck drivers block the BR-116 highway with their trucks during a strike in Curitiba, Brazil May 21, 2018. REUTERS/Rodolfo Buhrer 

Brazilian truck drivers block the BR-116 highway with their trucks during a strike in Curitiba, Brazil May 21, 2018. REUTERS/Rodolfo Buhrer 

Brazilian truck drivers sit while blocking the BR-116 highway with their trucks during a strike in Curitiba, Brazil May 21, 2018. The sign reads: "General strike, support us". REUTERS/Rodolfo Buhrer 

A vintage Melbourne tram passes by Victoria's Parliament Building in Melbourne, Australia, June 13, 2017. REUTERS/Jason Reed 

Former French economy minister Emmanuel Macron (2ndL) exits a tramway before a political rally for his political movement, En Marche !, or, Forward !, in Le Mans, France, October 11, 2016. REUTERS/Stephane Mahe

Former French economy minister Emmanuel Macron greets a passenger as he takes a tramway before a political rally for his political movement, En Marche !, or, Forward !, in Le Mans, France, October 11, 2016. REUTERS/Stephane Mahe

Former French economy minister Emmanuel Macron (R) takes a tramway before a political rally for his political movement, En Marche !, or, Forward !, in Le Mans, France, October 11, 2016. REUTERS/Stephane Mahe

Former French economy minister Emmanuel Macron (2ndR) takes a tramway before a political rally for his political movement, En Marche !, or, Forward !, in Le Mans, France, October 11, 2016. REUTERS/Stephane Mahe

Trams are seen in downtown Lisbon, Portugal August 29, 2016. Picture taken August 29, 2016. REUTERS/Rafael Marchante 

Trams are seen in downtown Lisbon, Portugal August 28, 2016. Picture taken August 28, 2016. REUTERS/Rafael Marchante 

Trams are seen in downtown Lisbon, Portugal August 30, 2016. REUTERS/Rafael Marchante 

An Atmosfera is a historic 1928's ATM tram that has been completely transformed into a mobile restaurant is seen downtown Milan, Italy, March 18, 2016. REUTERS/Stefano Rellandini

An Atmosfera is a historic 1928's ATM tram that has been completely transformed into a mobile restaurant is seen downtown Milan, Italy, March 18, 2016. REUTERS/Stefano Rellandini

An ATM tram is seen downtown Milan, Italy, March 18, 2016. REUTERS/Stefano Rellandini

An Atmosfera is a historic 1928's ATM tram that has been completely transformed into a mobile restaurant is seen downtown Milan, Italy, March 18, 2016. REUTERS/Stefano Rellandini

Britain's Prince Charles (R) and his wife Camilla, the Duchess of Cornwall, sit in a tram in Osijek, Croatia, March 15, 2016. REUTERS/Antonio Bronic 

Britain's Prince Charles (C) and his wife Camilla (L), the Duchess of Cornwall, sit in a tram next to Croatian politician Vladimir Sisljagic in Osijek, Croatia, March 15, 2016. REUTERS/Antonio Bronic TPX IMAGES OF THE DAY

A conductor (C) collects fares from candy floss sellers as they travel in a tram to a marketplace early morning in Kolkata, India, December 23, 2015. REUTERS/Rupak De Chowdhuri 

Youths cling to the side of a tram as smog blankets Sarajevo, Bosnia and Herzegovina, December 21, 2015. With severe air pollution affecting the city nestled among the mountains, the authorities have declared the first level of preparedness, advising the segment of the population that is at health risk to reduce movement in the mornings and evenings, appealing to drivers to use motor vehicles less and ordering heating utilities to lower the emission of harmful gases. REUTERS/Dado Ruvic 

People chat inside a tram in central Pyongyang, October 11, 2015. Isolated North Korea marked the 70th anniversary of its ruling Workers' Party on Saturday with a massive military parade overseen by leader Kim Jong Un, who said his country was ready to fight any war waged by the United States. REUTERS/Damir Sagolj 

The Swiss National Bank SNB logo is seen on a fence outside the construction site of the SNB building at the Federal square in Bern, Switzerland September 16, 2015. REUTERS/Ruben Sprich 

The Swiss National Bank SNB logo is seen on a fence outside the construction site of the SNB building at the Federal square in Bern, Switzerland September 16, 2015. REUTERS/Ruben Sprich 

A police officer helps to move a parked car blocking the passage of a "bonde" (tram) in the Santa Teresa neighborhood of Rio de Janeiro, Brazil, September 9, 2015. The Santa Teresa bonde, called "Bondinho" in Portuguese, is running with passengers as a part of a test period, after the service was stopped in 2011 following an accident that killed six people, according to residents. Picture taken September 9. REUTERS/Pilar Olivares

A "bonde" (tram) is seen on a line over the Arcos da Lapa (Lapa Arches), an old aqueduct from the colonial era, in the Santa Teresa neighborhood of Rio de Janeiro, Brazil, September 9, 2015. The Santa Teresa bonde, called "Bondinho" in Portuguese, is running with passengers as a part of a test period, after the service was suspended in 2011 following an accident that killed six people, according to residents. Picture taken September 9. REUTERS/Pilar Olivares

Members of five Syrian refugee families who arrived in Uruguay on October 9, 2014 demonstrate at the Independencia square in Montevideo, September 7, 2015. The families, consisting of 44 members, two of whom where born in Uruguay, are demanding to leave the country, stating high cost of living and difficulty in finding jobs to feed their families as reasons to leave. REUTERS/Andres Stapff 

Members of five Syrian refugee families that arrived in Uruguay on October 9, 2014 demonstrate at the Independencia square in Montevideo, September 7, 2015. The families, consisting of 44 members, two of whom where born in Uruguay, are demanding to leave the country, stating high cost of living and difficulty in finding jobs to feed their families as reasons to leave. REUTERS/Andres Stapff 

Passengers travel towards San Diego in a street trolley as they leave the border town of San Ysidro, California September 2, 2015. Picture taken September 2, 2015. REUTERS/Mike Blake 

Advertising wraps an electric trolly as it departs a transit hub in the border town of San Ysidro, California September 2, 2015. Picture taken September 2, 2015. REUTERS/Mike Blake 

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Young children sit watching from strollers as their mothers workout along the beach in Oceanside, California, August 14, 2015. REUTERS/Mike Blake 

Babies sit watching from strollers as their mothers workout along the beach in Oceanside, California, August 14, 2015. REUTERS/Mike Blake 

Shandi Hall, 27, poses for a portrait during a visit to a park with her children in Ferguson, Missouri July 24, 2015. When asked how Michael Brown's death affected her life, Hall said, "Seriously it hasn't, even though my house is a block away from the police station. I heard things happening. My husband was freaking so we left for two days in November. We didn't take walks for a while. I didn't feel like my safety was threatened. The violence was aimed towards police." When asked what changes she has seen in her community over the past year, Hall said, "There is a bigger sense of community." On August 9, 2014 a white police officer shot unarmed black teenager Michael Brown dead in the St. Louis suburb of Ferguson, Missouri. A year later Reuters photographer Adrees Latif returned to Ferguson, where he has documented events in the past year, to capture the portraits of local residents and canvass their views. REUTERS/Adrees Latif TPX IMAGES OF THE DAYPICTURE 3 OF 13 FOR WIDER IMAGE STORY "PORTRAITS OF FERGUSON"SEARCH "LATIF PORTRAITS" FOR ALL PICTURES 

Swiss President Simonetta Sommaruga (R) plays with a girl during the Swiss national holiday celebrations on the Ruetli meadows in central Switzerland August 1, 2015. REUTERS/Arnd Wiegmann 

Trams are seen in downtown Lisbon, Portugal July 30, 2015. REUTERS/Rafael Marchante 

Adults look at a girl as they sit on benches in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. More than 400 people, who left eastern Ukraine due to a military conflict, have arrived at the sanatorium in Korostyshiv since summer 2014, according to representatives. REUTERS/Valentyn Ogirenko 

A woman looks through the door of El Comercial cafe in Madrid, Spain, July 28, 2015. El Comercial, which has been opened since 1887 and is the oldest cafe in Madrid, closed on Monday. REUTERS/ Juan Medina TPX IMAGES OF THE DAY

A streetcar passes by a 60 ft (18 m) tall monument to Confederate General Robert E. Lee that towers over a traffic circle in New Orleans, Louisiana June 24, 2015. New Orleans Mayor Mitch Landrieu on Wednesday morning called for the replacement of the statue. REUTERS/Jonathan Bachman

People brave the cold and snow as they walk in the main pedestrian street of Istiklal in central Istanbul February 17, 2015. REUTERS/Murad Sezer (TURKEY - Tags: ENVIRONMENT SOCIETY) 

Two boys hold on to the side of a tram in downtown Lisbon January 26, 2015. REUTERS/Rafael Marchante (PORTUGAL - Tags: TRANSPORT SOCIETY) 

A light rail tram approaches as people walk on a snow covered street in Jerusalem January 7, 2015. A storm buffeted the Middle East with blizzards, rain and strong winds on Wednesday, keeping people at home across much of the region. REUTERS/Amir Cohen (JERUSALEM - Tags: ENVIRONMENT TRANSPORT) 

Pedestrians, with a vintage tram in the background, take a "selfie" as snow falls at the main shopping street of Istiklal in central Istanbul January 6, 2015. REUTERS/Murad Sezer (TURKEY - Tags: ENVIRONMENT SOCIETY) 

Passengers, one wearing a mask, ride a light rail tram in Jerusalem November 11, 2014. If there has been a constant target of Palestinian attacks during weeks of unrest in Jerusalem, it is the city's Light Rail, a sleek tram that snakes through downtown, past the ancient walls of the Old City, symbolically uniting the Jewish West and the Arab East, an area Israel captured in a 1967 war. Launched in 2011, the project was hailed as a piece of infrastructure that would transform the city, bringing Israelis and Palestinians closer through shared public rail transport. While in some ways that has happened, the past few months have torn that cosmopolitan picture apart. Picture taken November 11, 2014. REUTERS/Ronen Zvulun (JERUSALEM - Tags: TRANSPORT POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)

ATTENTION EDITORS: PICTURE 10 OF 26 PICTURES FOR WIDER IMAGE STORY 'RIDING THE FINE LINE'
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A general view shows Jerusalem's light rail tram as it passes by the old city's walls in Jerusalem November 13, 2014. If there has been a constant target of Palestinian attacks during weeks of unrest in Jerusalem, it is the city's Light Rail, a sleek tram that snakes through downtown, past the ancient walls of the Old City, symbolically uniting the Jewish West and the Arab East, an area Israel captured in a 1967 war. Launched in 2011, the project was hailed as a piece of infrastructure that would transform the city, bringing Israelis and Palestinians closer through shared public rail transport. While in some ways that has happened, the past few months have torn that cosmopolitan picture apart. Picture taken November 13, 2014. REUTERS/Ronen Zvulun (JERUSALEM - Tags: TRANSPORT POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)

ATTENTION EDITORS: PICTURE 01 OF 26 PICTURES FOR WIDER IMAGE STORY 'RIDING THE FINE LINE'
SEARCH 'TRAM RONEN' FOR ALL IMAGES 

A tram arrives at Praca do Comercio square in downtown Lisbon October 23, 2014. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A tram is seen in downtown Lisbon September 9, 2014. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY TRANSPORT) 

Magnets designed like trams are seen at a souvenir shop in downtown Lisbon September 3, 2014. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY TRAVEL) 

A vintage streetcar passes in front of a new housing complex along Market Street in San Francisco, California July 21, 2014. Six new residential buildings have been built in the upper Market Street area in the past year, and several others are in the works, according to local media reports. REUTERS/Robert Galbraith (UNITED STATES - Tags: POLITICS REAL ESTATE BUSINESS) 

A vintage streetcar passes in front of the Twitter headquarters on Market Street in San Francisco, California April 29, 2014. The company is to report first quarter earnings after market close REUTERS/Robert Galbraith (UNITED STATES - Tags: BUSINESS TRANSPORT LOGO SOCIETY) 

Trams are seen at the Alfama neighborhood in Lisbon March 25, 2014. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

People ride a tram with a sign reading, ''Another view on life" in Daugavpils March 21, 2014. In the former Soviet republics of Latvia and Estonia, there is unease over events in Crimea, which was formally annexed by Moscow last week on the pretext of safeguarding its Russian minorities. In the Latvian town of Daugavpils, where a Russian Tzarist-era fortress and barracks meet grey Soviet-era apartment blocks, you are more likely to be greeted in Russian than Latvian, with 51 percent of the city's residents Russians. Picture taken March 21, 2014. To match Insight UKRAINE-CRISIS/RUSSIA REUTERS/Ints Kalnins (LATVIA - Tags: SOCIETY POLITICS) 

A worker clears debris from the ruined remains of a tramcar station and a shop after anti-government protests in front of the presidential building in Sarajevo February 7, 2014. Protesters across Bosnia set fire to government buildings and fought with riot police on Friday as long-simmering anger over lack of jobs and political inertia fuelled a third day of the worst civil unrest in Bosnia since a 1992-95 war. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: POLITICS CIVIL UNREST) 

Workers clear debris from the ruined remains of a tramcar station and a shop after anti-government protests in front of the presidential building in Sarajevo February 7, 2014. Protesters across Bosnia set fire to government buildings and fought with riot police on Friday as long-simmering anger over lack of jobs and political inertia fuelled a third day of the worst civil unrest in Bosnia since a 1992-95 war. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: POLITICS CIVIL UNREST) 

A man looks at the ruined remains of a tramcar station and a shop after anti-government protests in front of the presidential building in Sarajevo February 7, 2014. Protesters across Bosnia set fire to government buildings and fought with riot police on Friday as long-simmering anger over lack of jobs and political inertia fuelled a third day of the worst civil unrest in Bosnia since a 1992-95 war. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: POLITICS CIVIL UNREST) 

A man looks through frozen windows of a tramway after heavy snowfall in Bucharest January 27, 2014. A powerful snowstorm hit southern Romania over the weekend causing traffic and heating problems in the Balkan country. REUTERS/Bogdan Cristel (ROMANIA - Tags: ENVIRONMENT TRANSPORT) 

A tram arrives at Praca do Comercio square in downtown Lisbon January 24, 2014. REUTERS/Rafael Marchante (PORTUGAL - Tags: SOCIETY) 

A boy stands on the edges of a vintage tram as it runs along the main shopping and pedestrian street of Istiklal in central Istanbul December 26, 2013. REUTERS/Murad Sezer (TURKEY - Tags: SOCIETY TRANSPORT)