Traffic on southbound Interstate 95 was backed up in Westport — and beyond — by a serious accident Thursday morning involving a tractor-trailer that shut down the highway in Norwalk. / Image, DOT traffic camera

WESTPORT — Thursday morning’s commute in Westport — and points east and west — is tangled in knots after a serious crash on Interstate 95 in Norwalk shut down the highway in both directions.

As a result, Westport school officials warn that bus pickups are likely to be delayed by significant congestion on roads throughout town Thursday morning.

Alternate routes, such as the Post Road, are clogged in both directions, with heavy traffic spilling over onto other local roads.

The I-95 crash involved a tractor-trailer truck, which caught on fire, in the area of southbound Exit 15 in Norwalk. The highway’s traffic cameras show southbound traffic backed up on the highway’s travel lanes through Westport and beyond.