Jackknifed Tractor Trailer Snarls Traffic on Blue Route

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    Scene from the accident.

    A multi-vehicle crash, involving a tractor trailer, is reeking havoc on Interstate 476 Friday afternoon.

    The accident occurred in the southbound lanes of I-476 near the on-ramp for Interstate 76 in West Conshocken around 11:30 a.m.

    At least two other cars were involved in the crash, which caused the tractor-trailer to jackknife across the expressway.

    At least four people suffered injuries, but it is unclear how serious those are.

    Motorists should expect delays as crews work to clear the disabled vehicles.

    Pennsylvania State Police say the road should be fully reopened by rush hour.