The incident happened as a speeding vehicle hit the woman riding a scooty from behind.
The woman, identified as one Nabanita Debnath, was a resident of Lanka town in the state's Hojai district.
She was reportedly employed as a teacher at a private institution in Pathsala. She succumbed to her injuries while being taken for treatment at a hospital.
Meanwhile, the vehicle that caused the accident remains unidentified. The scooty that she was raiding had registration numbers AS 15 S 5898.