Traffic along Highway 1 in Abbotsford was backed up in both directions on Friday afternoon after an RV rolled over into the median.
The incident took place at about 3 p.m. west of the Sumas exit before McCallum Road.
The fast lanes were closed in each direction, causing major traffic delays.
Crews were on scene to clean debris and address damage to the median.
At 4:30 p.m. the fast lanes re-opened in both directions, with some delays.