< I-64 | Home | I-68 >
I-66 | I-266 >
I-66N: Appeared April 1958 as Washington DC's proposed designation for the freeway connecting I-66 at the Spout Run Parkway into DC via the Three Sisters Bridge and the Whitehurst Freeway.
Not long after this became numbered as I-266, which became irrelevant anyway, as the freeway was never built.
Page last modified 2 January 2015