People read a magazine and drink a coffee as they wait at a tram stop in Kyiv, Ukraine February 25, 2021. REUTERS/Gleb Garanich

A maintenance tram removes snow from a track during heavy snowfall in Moscow, Russia February 13, 2021. REUTERS/Evgenia Novozhenina

A tram goes past a Melbourne sign on the first day of a five-day lockdown implemented in the state of Victoria in response to a coronavirus disease (COVID-19) outbreak in Melbourne, Australia, February 13, 2021. REUTERS/Sandra Sanders

Sanitation workers board a tram on the first day of a five-day lockdown implemented in the state of Victoria in response to a coronavirus disease (COVID-19) outbreak in Melbourne, Australia, February 13, 2021. REUTERS/Sandra Sanders

A sanitation worker cleans a tram stop on the first day of a five-day lockdown implemented in the state of Victoria in response to a coronavirus disease (COVID-19) outbreak in Melbourne, Australia, February 13, 2021. REUTERS/Sandra Sanders

A tram moves down an empty city road on the first day of a five-day lockdown implemented in the state of Victoria in response to a coronavirus disease (COVID-19) outbreak in Melbourne, Australia, February 13, 2021. REUTERS/Sandra Sanders

A couple embrace at a bus and tram station in Santa Teresa neighbourhood, where thousands of revellers should parade during the traditional block party known as Carmelitas, part of the Carnival celebrations, which would be held from February 12 until February 17 but were cancelled due the coronavirus disease (COVID-19) pandemic, in Rio de Janeiro, Brazil February 12, 2021. REUTERS/Ricardo Moraes

A tram drives through Alexanderplatz during a snowfall in Berlin, Germany, February 8, 2021. REUTERS/Annegret Hilse

People, some of them wearing protective face masks, wait at a tram stop after a quarantine hotel worker tested positive for the coronavirus disease (COVID-19) and new public health measures were announced in Melbourne, Australia, February 4, 2021. REUTERS/Loren Elliott

A person wearing a protective face mask rides a tram after a quarantine hotel worker tested positive for the coronavirus disease (COVID-19) and new public health measures were announced in Melbourne, Australia, February 4, 2021. REUTERS/Loren Elliott

A person wearing a protective face mask rides a tram after a quarantine hotel worker tested positive for the coronavirus disease (COVID-19) and new public health measures were announced in Melbourne, Australia, February 4, 2021. REUTERS/Loren Elliott

A person wearing a protective face mask rides a tram after a quarantine hotel worker tested positive for the coronavirus disease (COVID-19) and new public health measures were announced in Melbourne, Australia, February 4, 2021. REUTERS/Loren Elliott

A woman walks along a snow-covered tram track, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland January 15, 2021. REUTERS/Arnd Wiegmann

People wait beside the snow-covered tracks at a tram station, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland January 15, 2021. REUTERS/Arnd Wiegmann

People wait beside the snow-covered tracks at a tram station, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland January 15, 2021. REUTERS/Arnd Wiegmann

A Lisbon tram is seen through a billboard reflection before the prime minister announces the new lockdown due to the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, January 13, 2021. REUTERS/Pedro Nunes

A passenger waits for a tram at a stop during snowfall in Kyiv, Ukraine December 23, 2020. REUTERS/Valentyn Ogirenko

A poster demands "Wear a protective mask here. Please. All." at a tram stop, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland December 14, 2020. REUTERS/Arnd Wiegmann

A poster demands "Wear a protective mask here. Please. All." at a tram stop, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland December 14, 2020. REUTERS/Arnd Wiegmann

A tram drives through the city during the local coronavirus disease (COVID-19) lockdown in Dresden, Germany, December 14, 2020. REUTERS/Matthias Rietschel

A worker sanitises the interior of a tram following further easing of coronavirus disease (COVID-19) restrictions in Sydney, Australia, December 10, 2020. REUTERS/Loren Elliott

Workers wait for a tram's arrival to sanitise its interior following further easing of coronavirus disease (COVID-19) restrictions in Sydney, Australia, December 10, 2020. REUTERS/Loren Elliott

People walk past a city centre tram stop following further easing of coronavirus disease (COVID-19) restrictions in Sydney, Australia, December 10, 2020. REUTERS/Loren Elliott

A person wearing a protective face mask walks past a tram with a public health sign asking people to wear masks following further easing of coronavirus disease (COVID-19) restrictions in Sydney, Australia, December 10, 2020. REUTERS/Loren Elliott

People are seen near a tram stop following further easing of coronavirus disease (COVID-19) restrictions in Sydney, Australia, December 10, 2020. REUTERS/Loren Elliott

A person wearing a protective face mask walks past a tram stop following further easing of coronavirus disease (COVID-19) restrictions in Sydney, Australia, December 10, 2020. REUTERS/Loren Elliott

A tram is seen in during the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, December 5, 2020. REUTERS/Pedro Nunes

A man wearing a protective mask crosses the road near a tram during the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, December 5, 2020. REUTERS/Pedro Nunes

A tram is seen during the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, December 5, 2020. REUTERS/Pedro Nunes

Passengers wearing face masks following the coronavirus disease (COVID-19) outbreak ride on a tram in Hong Kong, China November 29, 2020. REUTERS/Joyce Zhou

A tram rides along a street on a frosty day in Omsk, Russia November 23, 2020. REUTERS/Alexey Malgavko

Visitors wearing face masks following the coronavirus disease (COVID-19) outbreak look at the view from inside the Peak tram in Hong Kong, China November 10, 2020. Picture taken November 10, 2020. REUTERS/Lam Yik

A woman leaves a tram at Cais do Sodre station during the coronavirus disease (COVID-19) outbreak, in Lisbon, Portugal November 6, 2020. REUTERS/Rafael Marchante

Josh Bear, 26, and Tram Truong, 24, monitor as election results come in during Election Day in Houston, Texas, U.S., November 3, 2020. REUTERS/Callaghan O’Hare

A woman wearing a protective mask speaks with a driver of a tram during the coronavirus disease (COVID-19) outbreak, in downtown Lisbon, Portugal October 31, 2020. REUTERS/Rafael Marchante

A tram is pictured on the empty street during the coronavirus disease (COVID-19) outbreak, in downtown Lisbon, Portugal October 31, 2020. REUTERS/Rafael Marchante

A priest wearing a protective mask waits at a tram stop in Rome, Italy October 30, 2020. REUTERS/Yara Nardi

A priest wearing a protective mask gets on a tram in Rome, Italy October 30, 2020. REUTERS/Yara Nardi

Passengers wearing protective face masks travel on a tram as Italy adopts new restrictions aimed at curbing a surge in the coronavirus disease (COVID-19) infections, in Rome, Italy October 28, 2020. REUTERS/Guglielmo Mangiapane

Passengers wearing protective face masks travel on a tram as Italy adopts new restrictions aimed at curbing a surge in the coronavirus disease (COVID-19) infections, in Rome, Italy October 28, 2020. REUTERS/Guglielmo Mangiapane

Passengers wearing protective face masks travel on a tram as Italy adopts new restrictions aimed at curbing a surge in the coronavirus disease (COVID-19) infections, in Rome, Italy October 28, 2020. REUTERS/Guglielmo Mangiapane

Passengers wearing protective face masks travel on a tram as Italy adopts new restrictions aimed at curbing a surge in the coronavirus disease (COVID-19) infections, in Rome, Italy October 28, 2020. REUTERS/Guglielmo Mangiapane

Passengers wearing protective face masks travel on a tram as Italy adopts new restrictions aimed at curbing a surge in the coronavirus disease (COVID-19) infections, in Rome, Italy October 28, 2020. REUTERS/Guglielmo Mangiapane

A man lies on tram tracks as people protest against the ruling by Poland's Constitutional Tribunal that imposes a near-total ban on abortion, in Warsaw, Poland October 26, 2020. REUTERS/Kacper Pempel

A man wearing a face mask stands inside of a tram, as the Czech government mandated further restrictions to curb the spread of the coronavirus disease (COVID-19) in Prague, Czech Republic, October 21, 2020. REUTERS/David W Cerny

People are seen in silhouettes as they walk near a tram stop, amid the outbreak of the coronavirus disease (COVID-19), in Manchester, Britain October 20, 2020. REUTERS/Phil Noble

People wear protective masks as they ride on a tram, amid the outbreak of the coronavirus disease (COVID-19), in Manchester, Britain October 20, 2020. REUTERS/Phil Noble

People wearing protective masks get off a tram, amid the outbreak of the coronavirus disease (COVID-19), in Manchester, Britain October 20, 2020. REUTERS/Phil Noble

People wearing protective masks against COVID-19 ride a tram as it passes the Natural History Museum in Vienna, Austria, October 19, 2020. REUTERS/Lisi Niesner

Secondary school students pose for a photo inside a replica of an old tram at the exhibition "The Hong Kong Story" in the Hong Kong Museum of History before it closes for an extensive revamp, in Hong Kong, China October 16, 2020. REUTERS/Tyrone Siu

French citizens wait for a tram to return to France after doing their shopping during the COVID-19 pandemic in Kehl, Germany, October 16, 2020, REUTERS/Kai Pfaffenbach

French citizens wait for a tram to return to France after doing their shopping during the COVID-19 pandemic in Kehl, Germany, October 16, 2020, REUTERS/Kai Pfaffenbach

People wear face masks as they wait for a tram following the outbreak of the coronavirus disease (COVID-19) in Manchester, Britain, October 5, 2020. REUTERS/Phil Noble

A woman wearing a face mask and gloves stands inside a tram as local authorities in the Italian capital Rome order face coverings to be worn at all times out of doors in an effort to counter rising coronavirus disease (COVID-19) infections, in Rome, Italy October 2, 2020. REUTERS/Guglielmo Mangiapane

Vienna's Mayor Michael Ludwig arrives to open the free influenza vaccination programme in a tram as the global spread of the coronavirus disease (COVID-19) continues in, Vienna, Austria, October 1, 2020. REUTERS/Lisi Niesner

Vienna's Mayor Michael Ludwig opens the free influenza vaccination programme in a tram as the global spread of the coronavirus disease (COVID-19) continues in, Vienna, Austria, October 1, 2020. REUTERS/Lisi Niesner

Vienna's Mayor Michael Ludwig opens the free influenza vaccination programme in a tram as the global spread of the coronavirus disease (COVID-19) continues in, Vienna, Austria, October 1, 2020. REUTERS/Lisi Niesner

Vienna's Mayor Michael Ludwig and council member Peter Hacker arrive to open the free influenza vaccination programme in a tram as the global spread of the coronavirus disease (COVID-19) continues in, Vienna, Austria, October 1, 2020. REUTERS/Lisi Niesner

Vienna's Mayor Michael Ludwig and council member Peter Hacker open the free influenza vaccination programme in a tram as the global spread of the coronavirus disease (COVID-19) continues in, Vienna, Austria, October 1, 2020. REUTERS/Lisi Niesner

A healthcare worker of the free influenza vaccination programme holds a flu vaccine inside a tram, as the global spread of the the coronavirus disease (COVID-19) continues, in Vienna, Austria, October 1, 2020. REUTERS/Lisi Niesner