A Throughfare is basically just a road that connects one town to another.
The definition of a Throughfare is a road from one place to another, esp a main road and a way through or access.
A highway could be considered to be a Throughfare but we mostly just call a highway a highway and roads a road.
Most people don't call the roads a Throughfare anymore.
But a throughfare is just a road that connects one location to another.
If you've been down any road you've down a Throughfare.