 In 2014 , PA 12 had an annual average daily traffic count ranging from a high of 59 @,@ 000 vehicles between the US 222 / US 422 and PA 183 interchanges to a low of 8 @,@ 600 vehicles between PA 73 and Walnuttown Road . The portion of PA 12 along the Warren Street Bypass is a part of the National Highway System . 
