Washington state:
Shall carry sufficient tire chains to meet the requirements from November 1 to April 1 of each year or at other times when chains are required for such vehicles:
I-90 between North Bend (MP 32) and Ellensburg (MP 101)
I-82 between Ellensburg Exit 3 (MP 3.00) and Selah Exit 26 (MP 26.00)
SR-97 between (MP 145) and Junction
SR-2 between Dryden (MP 108) and Index (MP 36)
SR-12 between Packwood (MP 135) and Naches (MP 187)
SR-97 between junction SR-14 (MP 4) Columbia River and Toppenish (MP 59)
SR-410 from Enumclaw to Naches
SR-20 between Tonasket (MP 262) and Kettle Falls (MP 342)
SR-155 between Omak (MP 79) and Nespelem (MP 45)
SR-970 between (MP 0) and (MP 10)
SR-14 (MP 18) to Junction 97 (MP 102)
SR-542 Mt Baker Highway between (MP 22.91) and (MP 57.26)