New Hampshire Route 202A (abbreviated NH 202A) is a 14.639 mi east–west state highway in Strafford and Rockingham counties in southeastern New Hampshire. The western terminus is in Northwood at U.S. Route 202 and New Hampshire 9, near their intersection with U.S. Route 4. Its eastern terminus is in downtown Rochester at New Hampshire Route 108 and New Hampshire Route 125.
If one travels from Strafford County, NH 202A will take one directly to Belknap County.
I named a New Hampshire county outside of the two cited in the context as being connected by NH 202A.  Maybe the system is fooled by the numerous small details in the context, and maybe by the punctuating parentheses and commas.