Pan-American Highway
The Pan-American Highway is a network of roads stretching across the American continents and measuring about in total length. Except for a rainforest break of approximately , called the Darién Gap, the roads link almost all of the Pacific coastal countries of the Americas in a connected highway system. According to "Guinness World Records", the Pan-American Highway is the world's longest "motorable road". However, because of the Darién Gap, it is not possible to cross between South America and Central America with conventional highway vehicles. Without an all-terrain vehicle, it is necessary to circumnavigate this terrestrial stretch by sea.
Kallang
The following expressways pass through Kallang:KPE consists of a 9 kilometres-long tunnel, which is the longest subterranean road tunnel in Southeast Asia. During its construction, the KPE tunnel was the world's sixth longest underground road project. Originally envisioned as two separate expressways, the 2.8 kilometres-long Kallang Expressway (KLE) and the 9.2 kilometres-long Paya Lebar Expressway (PLE), they were officially combined into one in 1991. Plans to build the KLE surfaced as early as 1981, and would have become the shortest expressway in Singapore if it was not merged into the KPE.