Tube drivers will be subject to plenty of radiation. It is radiation that heats the core of the earth and keeps it molten. The reason mines are hot rather than cold is because they are heated by radiation. It may well be less dangerous radiation than cosmic radiation but there is plenty of it underground.
As for the rest, tube drivers are expected to work in a system that has been badly underfunded for years. As a consequence equipment and safety are not what they should be. Frankly most of their money is probably danger money - just like a pilot's salary.
[This message has been edited by JuniorJetClubber (edited 15 March 2001).]