Restrictions are ideal. Especially with ice roads when it should be pretty obvious (i.e. they're water) when they're closed.
You may want to put something into the form for the first month of closure... but we can also copy and paste those to subsequent years.
Waze Global Champ, Mentor
Country Manager: Canada
Area Manager: Edmonton, AB; Prince George, BC; Maui, HI; Georgetown, KY and various places in between