Drugstores everywhere

A Walgreens drugstore is being built on Route 41, just west of the old Pyle's hardware store. But there's already a Walgreens store just 2 miles away, on the other side of Avondale, at Route 41 and Penn Green Road. I suppose pharmacy chains do a thorough market research study before embarking on a construction project for yet another store, but sometimes it makes you wonder.