Lori Wilson (50) was driving southbound when her car veered off the road hitting a mailbox and flipping onto its roof.
Police say the accident happened at approximately 9:20 am.
Waterville and State Police reconstructed the crash and the general consensus is that speed was not a factor.
Patrol Officer Michael Sellar said the vehicle went off the soft shoulder and rolled.
Wilson was partially ejected and was pronounced dead on the scene.
She was not wearing a seatbelt.