Quality affects locomotive speed and wagon capacity, scaling like most items in the game (1.3x uncommon, 1.6x rare, 1.9x epic, 2.5x legendary).
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
Trains are great, but what if they could do even more?
i do not feel or see any changes in locomotive speed
Indeed, there is no code in the mod to change the locomotive speed. I guess the description mentions that due to a brainfart (that, or a large language model generated this with little human oversight)