Is there a way to figure out what optimal postal routes there are in the United States?
For example, I am located near Portsmouth NH, but as far as I can tell, the nearest postal distribution center is in Boston. So, let's say I want to mail a package to Camden, Maine, as fast as possible. Am I better off driving the package to Boston and submitting it to the postal distribution center there, OR, am I better off posting it in Portsmouth?
If the Portsmouth office is just going to send it to the distribution center in Boston, then obviously it is better for me to drive it to Boston myself, but if Portsmouth will mail it Maine directly, then I should post it to Portsmouth instead.
Is there any way to determine these routes and figure out where it is best to post a package for fastest delivery?