CHP is pacing on the Grapevine due to weather conditions, according to a tweet from Caltrans.
According to the tweet, with snow starting to stick, CHP has resumed pacing operations.
GRAPEVINE: With snow starting to stick again, CHP has resumed pacing operations. Please follow the lead CHP car and drive carefully over the pass. pic.twitter.com/z0v6lZ4edk
— Caltrans District 6 (@CaltransDist6) February 21, 2019