Speed limit sign at the southern beginning of Interstate 680 North. The speed limit starts out at 65 mph.  (Photo taken 9/5/15).

Interstate 680 North at mile marker 16. I-680 in Ohio is different in that as you head north, the mile markers and exit numbers decrease. This is the opposite of how most mileposts and exit numbers work on the Interstate Highway System.  (Photo taken 9/5/15).

Interstate 680 North at mile marker 15.  (Photo taken 9/5/15).

Interstate 680 North at Exit 14: OH 164 - Western Reserve Rd  (Photo taken 9/5/15).

Interstate 680 North assurance shield north of Exit 14.  (Photo taken 9/5/15).

Speed limit assurance sign north of Exit 14. Speed Limit - 65 mph.  (Photo taken 9/5/15).

Interstate 680 North at mile marker 13.  (Photo taken 9/5/15).

Take Exit 11 to Boardman-Poland Rd.  (Photo taken 9/5/15).

Interstate 680 North at Exit 11: US 224 - Canfield / Poland  (Photo taken 9/5/15).

A half mile from Exit 9, the speed limit decreases to 60 mph.  (Photo taken 9/5/15).

Interstate 680 North at Exit 9: OH 170 - Midlothian Blvd / Struthers  (Photo taken 9/5/15).

Interstate 680 North as it enters the Youngstown corporation limit.  (Photo taken 9/5/15).

Interstate 680 North at Exit 8: Shirley Rd / Indianola Ave  (Photo taken 9/5/15).

Take Exit 7 to the Covelli Centre.  (Photo taken 9/5/15).

Take Exit 6 to Youngstown State University.  (Photo taken 9/5/15).

Interstate 680 North at Exit 7: US 62 West / OH 7 South - South Ave / Downtown  (Photo taken 9/5/15).

Entering the downtown Youngstown area, the speed limit decreases to 50 mph.  (Photo taken 9/5/15).

Another Interstate 680 North assurance shield.  (Photo taken 9/5/15).

Take Exit 6 to Butler Art Museum and Stambaugh Auditorium.  (Photo taken 9/5/15).

Interstate 680 North at Exit 6: US 62 East / OH 7 North - Hubbard  (Photo taken 9/5/15).

Just north of Exit 6, Interstate 680 North enters the sharp left curve seen here.  (Photo taken 9/5/15).

Take Exit 5 to Mill Creek Park and Fellows Riverside Garden.  (Photo taken 9/5/15).

Interstate 680 North approaching Exit 5 - 1/2 mile.  (Photo taken 9/5/15).

The speed limit remains 50 mph until we leave downtown Youngstown.  (Photo taken 9/5/15).

Interstate 680 North at Exit 5: Glenwood Ave / Mahoning Ave  (Photo taken 9/5/15).

Interstate 680 North at Exit 4B: Salt Springs Road  (Photo taken 9/5/15).

Interstate 680 North at Exit 4A: OH 193 / To US 422  (Photo taken 9/5/15).

Interstate 680 North at Exit 3C: Connecticut Ave / Belle Vista Ave  (Photo taken 9/5/15).

Interstate 680 North at mile marker 4.  (Photo taken 9/5/15).

Take Exit 3A to OH 11 North toward Ashtabula.  (Photo taken 9/5/15).

Interstate 680 North at Exit 3A: OH 711 / To Interstate 80 East - Girard / New York  (Photo taken 9/5/15).

Just before Exit 2, the speed limit increases to 65 mph and remains that way for the rest of Interstate 680 North's duration.  (Photo taken 9/5/15).

Interstate 680 North at Exit 2: Meridian Rd  (Photo taken 9/5/15).

Interstate 680 North assurance shield north of Exit 2.  (Photo taken 9/5/15).

Interstate 680 North at mile marker 1.  (Photo taken 9/5/15).

Interstate 680 North at Exit 1: OH 11 South - Canfield  (Photo taken 9/5/15).

A closer view of the ramp for Exit 1, as Interstate 680 North approaches its northern terminus and prepares to merge into Interstate 80 West.  (Photo taken 9/5/15).

As Interstate 680 North reaches its northern terminus on this ramp to Interstate 80 West, we see this advance mileage sign for I-80's Exit 223.  (Photo taken 9/5/15).