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PHILADELPHIA (CBS) — Four people have been hospitalized after a multi-vehicle crash shut down a stretch of the Roosevelt Boulevard Expressway. The accident happened around 4:45 a.m. Tuesday on the northbound lanes of Route 1 at Fox Street in the East Falls section of the city.

All lanes have reopened after they were all shut down in both directions for nearly eight hours.

Credit: CBS3

A tractor-trailer was traveling southbound when the driver lost control, flipped, and hit the median, according to officials. Two other vehicles were involved in the crash.

Credit: CBS3

Police on the scene said the driver of one of the cars is in critical condition. Two others in the car are in stable condition at Temple University Hospital.

The truck driver was seen walking around and doing OK.