I-5 in north Los Angeles County between Vista Del Lago Road and the Kern County line is in the middle of a pavement facelift. It will be bee-yoo-ti-ful when it's complete in 2015, but in the meantime, there are, of course, ramp closures ... the latest of which is the southbound I-5 off-ramp to Gorman Road, which will be closed August 6 - 15, 2013. Your alternates are Frazier Mountain Park Road and Quail Lake Road, shown here:
The GOOD news is the northbound I-5 off-ramp to Quail Lake Road is now OPEN. More info about the project is here.