APM: 9 Location: I-5 and SR 54, National City Reassurance shield after the SR 54 interchange as we enter National City. APM: 10 Location: I-5 and 18th St, National City Reassurance shield after the 18th St interchange. APM: 11 Location: I-5 and 8th St, National City 1.5 miles to SR 15. APM: 11 Location: I-5 and 8th St, National … Continue reading Interstate 5, SR 54 to SR 15