An ongoing police response on northbound Interstate 5 shut down the freeway at Del Mar Heights Friday afternoon.

While quiet now, those making the trip through Kettleman City this week will, perhaps unknowingly, land themselves right in the middle of what will become a massive construction zone in the spring.

Gridlock reigned Saturday on one of California's most vital freeways after state officials closed a 17-mile stretch of Interstate 5 in response to a pre-planned event in which live-fire artillery ...