1. A road that connects municipalities or regions, typically maintained by regional or state authorities, inferior in quality and importance to a federal highway but superior to local roads
The regional road connects the two neighboring towns efficiently.
A estrada regional conecta eficientemente as duas cidades vizinhas.
2. A secondary route used for inter-municipal or inter-regional transportation
We took the regional road to avoid the congested federal highway.
Pegamos a estrada regional para evitar a rodovia federal congestionada.