Peter Road, or Peterville Road, labelled Route 159, is a 2-lane collector highway in western Prince County, Prince Edward Island, Canada. It is near the community of Tignish. Its maximum speed limit is 80 km/h (50 mph). The highway runs from Route 158 (Harper Road) to Route 160 (Ascension Road) passing through the communities of Peterville, Leoville, and Ascension.