A pair of Audi vehicles were seen driving at high speed on the hard shoulder amid heavy traffic on the M32.
Police are investigating this incident of dangerous driving which happened in Bristol on New Year's Eve.
The force is now appealing for witnesses to come forward.
In a statement, Avon and Somerset Police said: "A red and a yellow Audi were seen driving at high speed and using the hard shoulder amid heavy traffic between junctions 1-3 of the M32 Northbound on Thursday, December 31 at about 4.15-4.25pm.
"Both vehicles exited the motorway at junction one.
"Officers would like to hear from anyone who witnessed the incident, particularly if they have dash cam footage of the two vehicles."
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If you can help, call 101 quoting reference 5220291572.
