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Driver injured in tractor-trailer rollover on ramp to Highway 400

A tractor-trailer rollover is under investigation on the Highway 9 westbound ramp to Highway 400 south in Newmarket, Ont., on Thurs., July 4, 2024. (Source: OPP/X) A tractor-trailer rollover is under investigation on the Highway 9 westbound ramp to Highway 400 south in Newmarket, Ont., on Thurs., July 4, 2024. (Source: OPP/X)
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One person is in the hospital following a tractor-trailer rollover on a ramp to Highway 400 late Thursday afternoon.

Provincial police say the big rig rolled onto its side as it headed onto the highway's southbound lanes south of Highway 9 in Newmarket.

No other vehicles were involved.

The 23-year-old driver is in serious condition.

Police closed a section of the area for the investigation, causing heavy traffic south of Line 5.

The roadway has since been reopened. 

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