Highway engineering refers to the systematic engineering carried out to achieve road transportation, including route design, civil construction, bridge and culvert construction, pavement laying, and the construction of ancillary facilities. It covers route surveying, subgrade earthwork, asphalt or cement pavement laying, bridge and tunnel integration, drainage, and traffic safety facilities. Highway engineering is an important component of modern transportation networks, widely applied in the construction of expressways, national and provincial highways, urban express roads, and rural roads, supporting regional economic development and efficient logistics transportation.