Handlebars

[night vessel]

Functionally similar to seats in that they keep you still on contraptions, except handlebars can be put on the sides of blocks, able to connect to each other, allowing for more floor space (also keeps player stood up). Could have the same variants as Create’s ladders, and would fit the aesthetic of some trains better, rather than wooden seats.

[dusty minnow]

i like this, for trains where drivers stand irk

[jade wind]

perhaps handlebars could also be placed on ceilings so you could have ziplines and stuff