"道路工程学" can be translated into English as "Highway Engineering" or "Road Engineering".
"Highway Engineering" is more commonly used in academic and professional contexts, especially when referring to the design, construction, and maintenance of major roads and highways.
"Road Engineering" is a broader term that encompasses all types of roads, from local streets to highways, and is also widely used.
Both terms are acceptable, but "Highway Engineering" might be slightly more specific to the field of major roadways.