Wagon Speed Adjuster
Adjust the maximum speed of all Wagons (rail cars), either by a fixed percentage or set all to a fixed speed.
Slower wagons are cheaper to buy, and have lower maintenance costs.
Default settings set cargo wagon speed to 50% of their normal value, passenger wagons to no more than 300km/h (essentially no change); you can/should adjust the configuration values in
Steamsteamappsworkshopcontent4468001472507469mod.lua
You can set wagon speed to either a fixed percentage of their default values, or set all wagons to a fixed maximum speed, or limit all wagons to no more than a maximum speed (but not increase speed for slower wagons).
Cargo and Passenger wagons can be configured separately.
See also Locomotive Speed Adjuster for the equivalent mod for locomotives.