A Jamestown man has been charged with driving while ability impaired by drugs after being pulled over on Buffalo Street in the city of Jamestown for a traffic violation last Friday. State Police in Jamestown say they arrested 29-year-old Devin Houghwot after he failed several standard field sobriety tests. He was charged with DWAI after being evaluated by a State Police drug recognition expert. Houghwot was processed and issued appearance tickets returnable to Jamestown City Court.