All lanes of the ramp from Highway 401 eastbound to Eglinton Avenue have been reopened after a seven-car pileup Thursday morning.

Ontario Provincial Police confirmed three men and one woman have been taken to hospital.

The woman is in serious condition after being trapped in a vehicle that was hit by a dump truck. The men are suffering from non-life-threatening injuries.

Collision reconstruction and investigation has completed, and the ramp has been reopened to traffic.