It comes after police were called to a report of a public order incident and a crash involving a BMW, a Peugeot 206 and a Ford Fiesta in Forton Road at 1.29pm.
They have since detained a man on suspicion of affray and dangerous driving.
The incident caused major congestion in Gosport and led to the closure of Forton Road, in both directions, between Camden Street and The Crossways.
Live maps from Google showed traffic at a standstill in certain parts of the Brockhurst area.
The Hampshire County Council traffic service Romanse said Forton Road was reopened just before 3.30pm, after it was cleared.