Analysis: "hunchback grandfather" means that this thing is arched, "infinite strength" means that it has strong bearing capacity, and "love to carry car traffic" points out its role, so the answer is "arch bridge"
Characteristics of Arch Bridge: The history of arch bridge construction in China is hundreds of years later than that in ancient Rome, which is famous for its arch bridge construction, but the arch bridge in China is unique. The beauty of form is rare in the world. There are steep arches with humps, flat arches like bright moons, flat perforated arch bridges with jade belts fluttering, and long arch bridges with natural longitudinal slopes.
Extended data:
Arch bridge is the most commonly used bridge type in China, ranking first among all kinds of bridges, especially highway bridges. According to incomplete statistics, 7% of highway bridges in China are arch bridges. As China is a mountainous country with abundant stone resources, the arch bridge is mainly made of stone.
Wuchaohe Bridge in Hunan Province, built at 1990 and with a span of120m, is the largest stone arch bridge in the world today. The reinforced concrete arch bridges built in China are more colorful and varied, which is the best in the world. Among them, box arch, hyperbolic arch, rib arch, truss arch, rigid frame arch and so on. They are all built frequently, and most of them are deck bridges with spacious decks and low cost.