See the stripes? More specifically, see the stripes on the road? Photo hunters from countries with zebra crossings should easily recognise the Hong Kong variant which makes use of bright yellow -- rather than the more traditional white -- colored stripes but serves the same function: of indicating that the demarcated area is where pedestrians are allocated extra rights of way to cross a road.
As can be seen in the first photo in this entry, there really can be a lot of people on and crossing the road at the same time in Hong Kong. (Incidentally, that section of Hong Kong -- in Causeway Bay, in front of the Sogo department store -- which also is the focus of the middle photo is particularly famed for its busy nature... and so much so that it's appeared in many movies, including Hong Kong's City Without Baseball (2008) and a feature-length documentary about the Berlin Philharmonic -- that has been among my Hong Kong International Film Festival viewings -- Trip to Asia: The Quest for Harmony (Germany, 2009).
For one more look at stripes on streets, here's also offering up photo number three -- taken from an upper floor of Hong Kong's Times Square and showing that even famously crowded Causeway Bay sometimes can appear relatively bereft of people! (And this even before the recent economic recession hit the territory... :S)