Copyright by KRON - All rights reserved

NAPA (KRON) -- Drivers in Napa are doing double takes on Friday night, some even pulling over to make sure their eyes are not deceiving them.

A highway sign has been altered to display the n-word.

A KRON 4 News viewer sent us this photo about an hour ago.

Sue Steirer said she was traveling along Trancas and Silverado Trail when she spotted the sign.

"We were shocked," she said.

A few other motorists snapped a photo of the sign and posted it on Twitter.

We contacted authorities who say Caltrans is currently working to fix the problem

Caltrans signs have been hacked in the past. No word on when Caltrans will have the offensive word off the sign.

(Copyright 2015, KRON 4, All rights reserved.)