Crews working on state Route 76 in North County will close the highway at the intersection of Old Highway 395 for about one hour at 1 p.m. Wednesday to conduct a rock blasting operation.

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The blasting is being done as part of SR-76 East Segment Project to widen and realign the highway to meet present and future traveling needs, Caltrans said Tuesday.

“The blasting will create a brief but loud sound and vibrations in the area,” officials said. “Motorists are advised to plan their travel accordingly. The blasting schedule is subject to change due to weather conditions.”

During the operation, Caltrans crews will establish a safety perimeter at Old Highway 395.

As a precaution, the nearby Park & Ride lot will closed and then reopen after the operations, Caltrans said. Park & Ride users should park in the temporary lot at the southeast corner of SR-76 and Old Highway 395, and take the shuttle to the regular bus stop at the northeast corner of the intersection.

The East Segment is the final part of three improvement projects to the Route 76 corridor between Interstates 15 and 5. The East Segment stretches 5.2 miles from South Mission Road to I-15.

Project information is at KeepSanDiegoMoving.com/SR-76-Corridor or by calling the project hotline at (619) 688-6670.