The MacArthur Road section of PA 145 was widened into a divided highway in 1970 .
In the 1950s , the southern terminus of PA 145 was cut back to the US 22 freeway in Whitehall Township and US 309 and PA 29 were rerouted to bypass Allentown .
The MacArthur Road section of PA   was widened into a divided highway in 1970 .
In the 1950s , the southern terminus of PA 145 was cut back to the US 22 freeway in Whitehall Township and US 309 and PA 29 were rerouted to bypass Allentown .