Local

Video shows chain-reaction crash in Boston’s O’Neill Tunnel that led to major traffic jam

BOSTON — A chain-reaction crash involving multiple vehicles in the O’Neill Tunnel in Boston caused mileslong delays on Interstate 93 for commuters heading into the city on Thursday morning.

The crash happened in the tunnel on the southbound side of the highway around 7 a.m. and delays from the wreck backed traffic up to Spot Pond in Stoneham.

Video from a camera overlooking the Zakim Bridge showed gridlock traffic as motorists slowly inched toward the tunnel.

Video released by MassDOT captured the moment the pileup crash happened in the far left lane of the tunnel.

The series of collisions started when a pickup truck rear-ended another vehicle, causing a car following behind to crash into the back of the truck, the video showed.

Another car is then seen in the video pulling to the side to avoid the stopped vehicles but it was also struck from the rear and pushed forward into the other cars.

The crash was cleared by around 8 a.m., according to MassDOT, but residual delays lingered as the morning commute continued.

It wasn’t immediately clear if anyone was injured in the crash.

Motorists were urged to seek an alternate route.

Watch for traffic updates from Catherine Parrotta on Boston 25 Morning News.

This is a developing story. Check back for updates as more information becomes available.

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