Gribblenation

This past year I drove the entirety of Interstate 215 in San Bernardino County and Riverside County. I-215 is a 54 mile loop of I-15 beginning near Cajon Pass in San Bernardino County and ending to the south in Murrieta of Riverside County.  I-215 essentially serves as a limited access replacement of US 66/91/395 on Legislative Route Number 31 south towards I-10.  South of I-10 the route of I-215 follows what was US 91/395 on LRN 43 to US 60/LRN 19.  I-215 shares a brief multiplex of CA 60 near Riverside and what was US 60/395 on LRN 19 to what was US 395/LRN 78 towards Murrieta. According to CAhighways.org I-215 was first approved as a Non-Chargeable Interstate south to I-10 as I-215 in 1972.  The route designation was swapped to I-15 East by 1973 with an additional portions of Non-Chargeable roadway added south to CA 60.  By 1982 the designation of I-15 East was reverted back to I-215. CAhighways.org on I-215 The 1975 State Highway Map shows I-1...