A multivehicle crash Tuesday reduced northbound Highway 41 to two lanes at Bullard Avenue, causing a significant traffic backup, according to Caltrans.

Caltrans said traffic was backed up to the Highway 180 interchange.

Drivers traveling north through the area should expect delays while the collision affects traffic flow.

Caltrans did not immediately provide information on injuries, how many vehicles were involved or when all lanes were expected to reopen.

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