The pensioner who died after being hit by a car on the A34 last night was from Bicester.
Police are appealing for witnesses following the fatal collision on the northbound carriageway, between South Hinksey and North Hinksey at about 7.10pm.
The 66-year-old woman got out of her own vehicle in a lay-by before crossing the northbound carriageway, and was hit by a black Alfa Romeo travelling in the outside lane.
A spokesman for South Central Ambulance said the woman died at the scene and no-one else was injured. Her name will not be released until she is formally identified.
Pc Andy Wickens of Abingdon Roads Policing said: "This collision tragically took the life of a woman and we urgently require anyone who could help our investigation to come forward.
"The woman was in a blue Citroen Xsara parked in a lay-by before she crossed the carriageway.
"If you witnessed the collision or saw this vehicle in the area at this time, I would ask you to contact me."
The road was closed while emergency services and police accident investigators worked on the scene and was re-opened at 5am.
Anyone with information should contact Pc Wickens at Abingdon Roads Policing on 08458 505505.
If you do not wish to speak to the police or give your name you can call the Crimestoppers charity on 0800 555111.
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