Police are stepping up their investigation following Saturday's fatal crash on the M32.
A female pedestrian died after being hit by a car on the southbound entry slip road at junction 2.
Avon and Somerset Police are now appealing for witnesses.
A spokesperson said: "At 7pm on Saturday (January 5) a serious road traffic collision took place involving a car and a woman pedestrian on the M32 slip road into Bristol at Fishponds (Junction 2).
"If anybody was there and witnessed the incident, please contact us on 101 quoting reference 5219003229."
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