Coronavirus: Europe grapples with lifting limits on travel
Half a million masks were being handed out on Wednesday in stations around Paris, with France set to ease public transport restrictions next month.
But although Europe's leaders want to kickstart economies hit by the Covid-19 pandemic, how to resume movement of people remains a difficult issue.
Unions expressed fears at the French plans to let people move freely with a mask from 11 May on trips up to 100km.
And Germany extended a warning against global travel until 14 June.
That means no decision has yet been taken on families taking their children on summer holidays.
In common with several other EU states, Germany closed some of its land borders last month to try to curb the spread of coronavirus and repatriated 240,000 German travellers from abroad.
Calls for airline voucher system
EU governments are having to decide how to resume public movement both within their countries as well as beyond.
Tourism accounts for 10% of the 27-member bloc's economic output and EU ministers this week proposed possible tourist corridors between member states.
Airlines have been severely hit by the grounding of planes and 12 EU states have called for travel rules to be changed so that airlines can compensate passengers with vouchers rather than cash for cancelled flights.
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Neighbouring countries are also trying to handle cross-border workers. Germany has relaxed a quarantine on Polish commuters but Poland has not yet followed suit. Hundreds of people staged protests in Polish border towns last week.
While Poland said it would reopen hotels and shopping centres from 4 May, there was no indication when it would reopen its borders.
What is France doing?
France's decision to require masks on trains and buses follows Germany's move this week.
Prime Minister Edouard Philippe said there would be no unrestricted travel from 11 May but France would be divided into red zones, where Covid-19 was still circulating, and green zones where it was less of a risk.
There would have to be social distancing on the metro in Paris and services would be ramped up from 30% capacity now to 70% after 11 May. Train operator SNCF has urged employers to continue home-working and offer flexible shifts to prevent a surge in the rush-hour.
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