Which engineering discipline may involve the design of roadways and bridges?

The discipline that involves the design of roadways and bridges is civil engineering. This branch of engineering is specifically focused on the development, design, construction, and maintenance of infrastructure projects, which include transportation systems like roads, highways, bridges, and tunnels. Civil engineers use principles of engineering, soil mechanics, hydraulics, and materials science to ensure that such structures are safe, efficient, and capable of handling the demands of traffic and environmental conditions.

In contrast, architecture primarily involves the design and aesthetics of buildings and spaces, aerospace engineering focuses on the design and development of aircraft and spacecraft, and industrial engineering is concerned with optimizing complex processes or systems, often in industries like manufacturing. None of these fields concentrate on the specific infrastructure tasks associated with road and bridge design, which is the core of civil engineering.