Trains

A train is a vehicle that can run on tracks. In Railhead, special trains, known as "K-Trains", are used to navigate through K-Gates. The Damask Rose implies that the only quality needed to navigate through a K-gate is speed. Anything that is not fast enough to be accepted by the K-gate is destroyed. K-trains are the fastest way to get from one place to another.

K-Trains are sentient, unlike their non-K-gate counterparts. They seem to be software-based, as special software known as a "Train-killer" can take a train's life.

Trains can deploy "Maintenance Spiders" to keep themselves maintained. These can also attack and destroy threats to the train or its passengers, or, in some circumstances, kill the occupants of the train.

Railforce is an agency meant to keep order across the network, and uses K-trains as their primary method of transportation.