APM: 73 Location: Antelope Valley Fwy and SR 138, Los Angeles Cty Reassurance shield as 138 east joins 14 south. APM: 73 Location: Antelope Valley Fwy and SR 138, Los Angeles Cty SR 14 is the Antelope Valley Freeway in Los Angeles County. APM: 71 Location: Antelope Valley Fwy and Ave F, Los Angeles Cty Reassurance shield after … Continue reading California State Route 14, SR 138 to SR 138