The collision occurred on the southbound carriageway at junction 21 (Samlesbury) at around 5.20pm on Wednesday (February 23).
Two lanes were closed near the exit slip road following the crash, resulting in 25 minutes delays.
All lanes reopened at approximately 6.15pm, but "stop-start traffic" and delays of 20 minutes remained in the area.
Traffic has since returned to normal.
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