Work Carts are mobile workbenches used in Railcraft as a means of taking one's work-space with them when assembling and plotting out large stretches of track.
The Work Cart is as simple as it is useful: a Workbench placed inside an empty Minecart. The cart cannot be ridden in, and it will not store any items or materials. However, it can be pushed and pulled as a typical cart can, and can be linked to other Carts (using the Crowbar) to form part of a Train. It also functions like a typical workbench; right-clicking with anything (other than a Crowbar) brings up the Crafting Table GUI. Work carts can also be found in dungeons