What term describes roads where vehicles are operated under structures?

The term that accurately describes roads where vehicles are operated under structures is "Enclosed Roadways." This designation highlights that these roads are situated beneath bridges, overpasses, or other types of structures, essentially creating a tunnel-like environment for vehicular traffic. Enclosed roadways are designed to protect vehicles from overhead hazards and may offer shelter from adverse weather conditions.

The other options do not specifically convey the concept of vehicles operating beneath structures. For example, "Restricted Pathways" implies limitations on access or types of vehicles allowed, which does not necessarily relate to the positioning of the road. "Ground Routes" is a more generic term that can refer to any road at surface level without indicating whether it is under a structure. "Underpasses" specifically refers to structures allowing vehicles to pass underneath, but it does not encompass the broader category of roads that may also be referred to as enclosed roadways.