Last Driven September 2020 APM: 18 Location: SR 78 and SR 115, Imperial Cty Reassurance shield as 115 south joins 78 east. APM: 18 Location: SR 78 and SR 115, Imperial Cty 22 miles to I-8 via SR 115. 82 miles to Blythe via SR 78. APM: 21 Location: SR 78 and SR 115, Imperial … Continue reading California State Route 115, SR 78 to SR 78