In some situations you'll want to apply restrictions to an asset. As a Railfleet administrator you can set up these restriction types yourself in the administration panel. Go to the "Maintenance" section and click the "add" link next to "Restriction types".
Once you're on the next page you can enter the name of the restriction type (e.g. not faster than 80km/h, not allowed to run at night, ...) and a description (optional).