Officials with the Transit Authority of River City have unveiled new network maps, which will cut bus service in Louisville by 12% next year. The new routes, and an entirely new numbering system, will go into effect in August 2026. He said the new map will also help the bus system be more efficient and useful for its existing riders. A map showing TARC's new bus routes starting in August 2026. TARC officials say they plan to launch a public education effort to help riders learn about the new routes and numbering system ahead of implementation.