I plan on adding this to a multiplayer game stealthily, and adjusting the min and max values to something barely perceptible, until somebody notices. Could you include an in-game setting to disable walk speed printing to chat? Easy enough to cut it out of the control file but I'm sure people would find it useful!

Unrelated to this mod but I have another idea - a mod which randomly disables train signals while you're not looking at them

I haven't tested it in multiplayer, but it should work.
I can add an option: not to print a message when the speed changes