Answer:
they used the network of roads
The West, region, western U.S., mostly west of the Great Plains and including, by federal government definition, Alaska, Arizona, California, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming.
I would say that New England, having important ports like New York made it a good candidate for industrial development and also they were the entry point for new immigrants who provided the workforce for new industries and also they were the first settled places in the US so had a jump start on developing industries.
