 Odd-numbered routes were north-south and increased in number bearing west, ranging from OR 3 in Wallowa County to OR 53 in Clatsop and Tillamook counties.Even-numbered routes were east-west and increased in number bearing south, ranging from OR 6 in Tillamook and Washington counties to OR 70 in Klamath County.East-west highways in eastern Oregon were given route numbers between OR 74 and OR 86, again increasing in number to the south.