The 🕰️ Historic Alignment tag is used for segments of highway that follow a former or original route of a major U.S. highway—often bypassed, decommissioned, or rerouted over time. These alignments may include old pavement, narrow bridges, vintage signage, or remnants of once-thriving roadside towns.

These routes are valuable for their connection to highway history and often appeal to travelers interested in nostalgia, Americana, or the evolution of U.S. road infrastructure. They may no longer carry heavy traffic but still offer a glimpse into the past.