Interstate 90 (I-90) within the US state of Pennsylvania spans 46.297 miles (74.508 km), all within Erie County, from the Ohio border near West Springfield to the New York border near North East. I-90 is the primary west–east highway in the Erie area, passing south of downtown and having interchanges with I-79, which connects Downtown Erie to southern Pennsylvania and beyond, and I-86, linking Erie to the Southern Tier of New York. US Route 20 (US 20), which has an interchange with I-90 near the New York–Pennsylvania border, parallels I-90 across the county. Throughout its length, I-90 has also been designated as the AMVETS Memorial Highway, with signs posted at each state line.