 Once this new alignment was created, the road's length was , as around of the old alignment was bypassed.The old alignment was turned back from Sarnia to Sombra in 1979, from Sombra to Walpole Island in 1980, and finally from Walpole Island to Wallaceburg in 1984.It was named the St. Clair Parkway and designated as Lambton County Road 33 and Kent County Roads 32 & 33.