The government will proceed with “extreme caution” exiting lockdown, the transport secretary said as he revealed plans to “get Britain moving again”.
Grant Shapps pledged £250m for emergency improvements to cycling and walking infrastructure.
But he would not confirm a 14-day quarantine for passengers arriving in the UK.
A further 346 coronavirus deaths have been recorded in the UK, taking the total to 31,587.
The transport secretary said the move beyond Covid-19 would be a “gradual progress” and not a “single leap to freedom”.
Even if the UK transport network was running at full capacity, social distancing rules would mean only one in 10 passengers could travel, he said.