It happened on Sunday night near Tedburn.
Emergency services were called just after 7.10pm last night (Sunday 17th November) to reports of the crash.
It happened on the East-bound carriageway between Fingle Glen and the Alphington Junction.
4 vehicles were involved and one woman had to be cut free by fire crews.
Officers tweeted to say "fortunately" there were no serious injuries.
A30 Fingle Glen junction has seen four vehicles written off this evening but fortunately no serious injuries. Road is currently being cleaned. A30 should fully reopen in about 30 minutes. Sgt B pic.twitter.com/N981RfoeBT— Alliance RPT 📱+🚗=❌ (@RoadPolAlliance) November 17, 2019