A MAJOR route out of Portsmouth was closed throughout the night after a car smashed into barriers.
The M275, where it joins the M27 eastbound over the Portsbridge Roundabout at Hilsea, has now re-opened following hours of closure.
Police closed the motorway shortly after 3am today after a Peugeot 306 crashed into barriers.
The 22-year-old man driving the car sustained life-threatening injuries and was treated at the scene by paramedics before being taken to Queen Alexandra Hospital.
His condition is described as serious.
Firefighters from Cosham and Southsea were called out in the early hours and were initially looking for other casualties.
It was initially believed that there could have been walking wounded on the motorway, but after an hour-long search it was clear there was only one casualty.
The M27 eastbound from junction 12 was closed until 10am so that emergency repairs could take place on the damaged barriers.
Traffic from the M275 northbound was only able to join the M27 westbound during that time.
Diversions were in place via the J&J junction and the A27 Western Road.