Complex sentence: Prior to 1953, Highway 22 was the designation of the route connecting the US border south of Melita to Highway 1 in Virden, which is now the southern section of PTH 83.
Split into simpler sentences: Prior to 1953, Highway 22 was the designation of the route connecting the US border south of Melita to Highway 1 in Virden. This highway is now the southern section of PTH 83.