State Police open one lane on Route 128 after five-car crash near Dedham

State Police have opened one lane and are working to move a tractor-trailer that is blocking most of Interstate 95 near Exit 16A in Dedham after a five-car crash paralyzed the southbound highway.

The drivers of the tractor trailer, dump truck, and three cars involved in the crash were not injured, State Police said in a statement. Authorities warned drivers to expect a “extensive traffic delay” and seek alternate routes.

Around 3:20 p.m., the 50-foot long tractor trailor jackknifed, colliding with the dump truck, which was towing a trailer, and three cars, the statement said. The cause of the crash has yet to be determined.

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State Police are estimating it will take another 30 minutes before they can remove the tactor-trailer and open the center lane, the official State Police Twitter feed said. Traffic is currently backed up to Lexington.