Or another Railbike travelling in the opposite direction?
[0] https://hemomkringvandring.se/wp-content/uploads/2020/06/IMG...
See also: Shweeb - https://www.nzherald.co.nz/travel/shweeb-how-new-zealands-hy...
A normal bicycle can be lifted in one hand. This looks more unwieldy but not too much heavier. It shouldn't be hard.
(If two riders are both so oblivious that neither sees the other coming from at least a quarter-mile off, they deserve to crash.)