APM: 12 Location: Costa Mesa Fwy and Garden Grove Fwy, Tustin Just after the SR 22 interchange we’ll enter Tustin. APM: 11 Location: Costa Mesa Fwy and 17th st, Tustin Follow 4th Street for I-5 north. I-5 south comes up in a half mile. APM: 11 Location: Costa Mesa Fwy and 17th St, Tustin Reassurance shield after 17th … Continue reading California State Route 55, SR 22 to I-5