"Hong Kong's roads are among the most heavily used in the world." So goes the opening line on a page on the Hong Kong road network on the Highways Department's website. And when looking at the above photo of a jammed Gloucester Road, few would disagree with that statement.
With a limited amount of land and space to place the roads along with other human-made structures that are part and parcel of urban living, the planners and constructors of Hong Kong's roads have gone underground and overground in addition to staying at ground level. For instance, parts of Salisbury Road -- which many pedestrians dislike because of it being almost impossible to simply cross at ground level (and instead are forced into some of the many pedestrian underpasses and tunnels that crisscross Hong Kong to get from one side to another) -- run underground even while others are at ground level.
Incidentally, some people checking out this Photo Hunt entry might wonder how it is that roads in Hong Kong -- and in its equally Chinese sounding districts of Wan Chai and Tsim Sha Tsui -- might have such Anglophilic names. This is because even though British rule in Hong Kong came to an end on July 1st, 1997, Asia's World City has -- for better or worse -- not seen fit to go about wholesale wiping out traces of its British colonial past, Consequently, there not only remain parts of the Big Lychee that have retained their British names but, also, other parts of the cultural space that still feel distinctly British -- including such as its British pubs and the number one most popular spectator sport remaining association football (i.e., soccer to Americans).
Still, this is not to deny that Hong Kong is predominantly Chinese culturally. Also, the majority of non-Chinese in Hong Kong are actually other Asians as opposed to non-Asians -- and the largest non-Asian expatriate community is no longer British! In addition, the French also have a pretty significant cultural presence -- not least through its Le French May cultural extravaganza which, despite its name, now stretches from April through to June!! ;D