What would happen to new brunswicks trade route after joining the confederation

The New Brunswick's trade route would become the busiest trade route between the US and Canada after joining the Confederation.

Explanation:

The geographical location of New Brunswick renders it to be the most significant road link between the US and Canada. Until New Brunswick was an independent province, it was pursued by many to join their side as it would be a strategical advantage for the one who controls the New Brunswick's trade route.