Street dog Boji, a regular user of commuter ferries, buses, metro trains, and trams, is pictured on a ferry which runs between the city's Asian and European sides, in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains, and trams, is pictured on a ferry which runs between the city's Asian and European sides, in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains and trams, sits on a tram in the Kadikoy district in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains, and trams, sits on a tram in the Kadikoy district in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains and trams, lies on the ground in front of the Besiktas pier in the Kadikoy district in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains, and trams, sits in a ferry which runs between the city's Asian and European sides, in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains, and trams, sleeps on a ferry which runs between the city's Asian and European sides, in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains, and trams, sleeps on a ferry which runs between the city's Asian and European sides, in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Street dog Boji, a regular user of commuter ferries, buses, metro trains and trams, lies on the floor of a tram in Kadikoy district in Istanbul, Turkey October 5, 2021. Picture taken October 5, 2021. REUTERS/Murad Sezer

Police officers in protective masks stand on a tram platform in the city centre, during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, September 28, 2021. REUTERS/Loren Elliott

A pedestrian wearing a protective face mask crosses tram lines in the city centre during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, September 24, 2021. REUTERS/Loren Elliott

A pedestrian wearing a protective face mask crosses tram lines in the city centre during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, September 24, 2021. REUTERS/Loren Elliott

A pedestrian walks past a tram with an advertisement featuring professional basketball player and actor LeBron James in the city centre during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, September 24, 2021. REUTERS/Loren Elliott

A tram is seen downtown, amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, September 15, 2021. REUTERS/Pedro Nunes

Trams are seen downtown, amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, September 15, 2021. REUTERS/Pedro Nunes

A tram is seen in downtown Lisbon amid the coronavirus disease (COVID-19) pandemic in Portugal, September 15, 2021. REUTERS/Pedro Nunes

Health workers stand behind the registration desk inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker stands inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

Zurich's Head of the Department of Health Natalie Rickli gives explanations inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

Zurich's Head of the Department of Health Natalie Rickli stands in front of the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

Zurich's Head of the Department of Health Natalie Rickli gives explanations inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A health worker draws Moderna coronavirus disease (COVID-19) vaccine into a syringe inside the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

Zurich's Head of the Department of Health Natalie Rickli stands in front of the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

The COVID-19 Impftram vaccination tram is parked during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A private security guard stands in front of the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A police car is parked in front of the COVID-19 Impftram vaccination tram during a media presentation in Zurich, Switzerland September 14, 2021. REUTERS/Arnd Wiegmann

A lone passenger wearing a protective face mask rides a light rail tram through the quiet city centre during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, August 31, 2021. REUTERS/Loren Elliott

A tram driver follows a light rail route through the quiet city centre during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, August 31, 2021. REUTERS/Loren Elliott

A lone passenger sits at a tram stop on a mostly-empty city centre street on the first day of a lockdown as the state of Victoria looks to curb the spread of a coronavirus disease (COVID-19) outbreak in Melbourne, Australia, July 16, 2021. REUTERS/Sandra Sanders

A view of a tree that fell on the overhead wire of a tram line during thunderstorms and torrential rain in Zurich, Switzerland July 13, 2021. REUTERS/Arnd Wiegmann

A view of a tree that fell on the overhead wire of a tram line during thunderstorms and torrential rain in Zurich, Switzerland July 13, 2021. REUTERS/Arnd Wiegmann

A view of a tree that fell on the overhead wire of a tram line during thunderstorms and torrential rain in Zurich, Switzerland July 13, 2021. REUTERS/Arnd Wiegmann

A pigeon walks down the aisle of a light rail tram devoid of passengers at Circular Quay during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, July 12, 2021. REUTERS/Loren Elliott

A passenger wearing a protective face mask is reflected in the window of a light rail tram with social distancing markers at Circular Quay during a lockdown to curb the spread of a coronavirus disease (COVID-19) outbreak in Sydney, Australia, July 12, 2021. REUTERS/Loren Elliott

A reflection of a tram is seen in Lisbon downtown amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, July 8, 2021. REUTERS/Pedro Nunes

People sit inside a tram in downtown Lisbon amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, July 8, 2021. REUTERS/Pedro Nunes

Police cordon tape is seen in a garbage can at the Faerberwaidweg tram stop, where a man attacked passers-by with a knife, in Erfurt, Germany, June 28, 2021. REUTERS/Annegret Hilse

A general view shows the Faerberwaidweg tram stop, where a man attacked passers-by with a knife, in Erfurt, Germany, June 28, 2021. REUTERS/Annegret Hilse

Police cordon tape is seen in a garbage can at the Faerberwaidweg tram stop, where a man attacked passers-by with a knife, in Erfurt, Germany, June 28, 2021. REUTERS/Annegret Hilse

A general view shows the Faerberwaidweg tram stop, where a man attacked passers-by with a knife, in Erfurt, Germany, June 28, 2021. REUTERS/Annegret Hilse

A tram is seen amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, June 24, 2021. REUTERS/Pedro Nunes

A tram is seen in Camoes square amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, June 24, 2021. REUTERS/Pedro Nunes

A tram is seen in Camoes square amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, June 24, 2021. REUTERS/Pedro Nunes

A tram is seen amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, June 24, 2021. REUTERS/Pedro Nunes

An old tram is seen in Paulo Marques' property in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

A man restores an old tram in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

An old tram is seen in Paulo Marques' property in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

Paulo Marques and his son stand near a tram from his collection, in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

Paulo Marques rides a tram from his collection as his son helps to clear the way, in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

A man restores an old tram in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

An old tram is seen in Paulo Marques' property in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

General view of rails and a tram that's part of Paulo Marques collection, in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

Paulo Marques' son rides a tram from his fathers collection in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes

A man restores an old tram in Carregado, Portugal, June 22, 2021. Picture taken June 22, 2021. REUTERS/Pedro Nunes