Suffixed Interstates

Interstate 50: The Golden Anniversary Primary Routes Interstate Loops and Spurs Suffixed Interstates Links

I-5W/I-5E: Tracy-Dunnigan, CA (I-5W is now parts of I-505, I-80 and I-580)

I-15E: Temecula-Devore, CA (now I-215)

I-15W: Pocatello-Rupert, ID (now I-86)

I-24W: Jackson, TN-Hayti, MO (never connected to I-24; now I-155)

I-35W/I-35E: Hillsboro-Denton, TX (still exists)

I-35W: Wichita-Salina, KS (now I-135)

I-35W/I-35E: Lakeville-Forest Lake, MN (still exists)

I-59B: Birmingham, AL (now I-459)

I-70S: Washington-New Stanton, PA (now I-70)

I-70S/I-70N: Frederick, MD-Washington, DC (I-70S) and Baltimore, MD (I-70N) (I-70S is now I-270, and I-70N is now I-70)

I-75E: Tampa/St. Petersburg, FL (now I-275; swapped designations with I-75 in 1980)

I-80N: Echo, UT to Portland, OR (now I-84)

I-180N: Boise, ID (only suffixed 3di; now I-184)

I-80S: Big Springs, NE-Denver, CO (now I-76)

I-80N: Neola-Loveland, IA (now I-680)

I-80N: Norwalk to Edinburg, OH (now I-80)

I-80S: Youngstown, OH to Camden, NJ (now I-76)

I-81E: Scranton-Scotrun, PA (now I-380)