Realistically, the transport network is going to be prioritised towards essential travel for some time. Clearly it going to take a bit of time before travel is unrestricted even if people can travel a bit more locally after an initial level of lockdown easement.
In the normal course of events, there is less essential travel at the weekend and during off-peak times so, in time, there could presumably be some capacity for travel which is not essential but it is going to have to be limited.
I'd like to think that people don't consider themselves stranded just because they can't travel long distances or use transport - there is virtue in people exploring and walking in their own area, seeing things not noted before. There is always something new of notice, even within an hour or so of people's front door.
I think this is great
https://www.lner.co.uk/our-destinations/travel-inspiration/virtual-days-out/ - providing virtual experience of days out in the current circumstances - yes, I know it isn't visiting in person but the experience of being taken through the gardens at Kew
https://www.kew.org/about-us/virtual-kew-wakehurst or the British Museum
https://britishmuseum.withgoogle.com/ is the next best thing to visiting. This sort of thing, with donations, is how attractions are going to have to adapt to survive.