Advance signage for Exit 12 as the ramp to Interstate 99 South widens to two lanes just ahead. (Photo taken 4/14/17).

View on Interstate 99 South as it passes under the ramps to and from Interstate 86. (Photo taken 4/14/17).

Here, Interstate 99 South passes under the ramp from Interstate 86 East to Interstate 99 South. (Photo taken 4/14/17).

Interstate 99 South at Exit 12: Robert Dann Drive (Photo taken 4/14/17).

The speed limit on Interstate 99 South starts out at 65 mph. This is the standard speed limit on most rural Interstate highways in New York. (Photo taken 4/14/17).

Interstate 99 South at Exit 11: NY 417 - Gang Mills (Photo taken 4/14/17).

View on Interstate 99 South at mile marker 11. Contrary to how most Interstate highways in New York are numbered, the exit numbers on I-99 are based on the total mileage of I-99 in New York rather than being numbered sequentially. (Photo taken 4/14/17).

Interstate 99 South reassurance shield. I-99 in New York runs concurrently with US 15 for its full length. (Photo taken 4/14/17).

The next Rest Area after the upcoming Parking Area is the Pennsylvania Welcome Center, which is 17 miles ahead. (Photo taken 4/14/17).

Parking Area / Text Stop on Interstate 99 South in Steuben County. (Photo taken 4/14/17).

View on Interstate 99 South at mile marker 9. (Photo taken 4/14/17).

Interstate 99 South at Exit 8: NY 417 - Erwin / Addison (Photo taken 4/14/17).

Interstate 99 South at mile marker 7. (Photo taken 4/14/17).

Interstate 99 South at Exit 6: CR 5 - Presho (Photo taken 4/14/17).

Another Interstate 99 South reassurance shield. (Photo taken 4/14/17).

The speed limit remains 65 mph on Interstate 99 South. (Photo taken 4/14/17).

View on Interstate 99 South at mile marker 6. (Photo taken 4/14/17).

Mile marker 5 on Interstate 99 South in Steuben County. (Photo taken 4/14/17).

View on Interstate 99 South at mile marker 3. (Photo taken 4/14/17).

Interstate 99 South at mile marker 2. (Photo taken 4/14/17).

One final Interstate 99 South reassurance shield. (Photo taken 4/14/17).

View on Interstate 99 South at mile marker 1. (Photo taken 4/14/17).

Take the next exit (the first exit on US 15 South in Pennsylvania) to Cowanesque Lake. (Photo taken 4/14/17).

View on Interstate 99 South as it approaches the Pennsylvania border, at which point its designation will end and become the Future Interstate 99 designation. (Photo taken 4/14/17).

Interstate 99 END shields as the Pennsylvania state line and welcome sign come into view. US 15 will proceed south to Williamsport as the Future Interstate 99 corridor. (Photo taken 4/14/17).