F1 race is understandable since it's a street circuit and traffic has to be directed elsewhere.
But for APEC, it's all about sweeping the streets clean of peasants to make way for the elites and globalist masters. Letting the peasants know their place.
Of course, the official narrative is a typical 'security arrangement'.
Sinkieland had something similar when the IMF and World Bank had their group therapy session here. The entire Suntec area was turned into a fortified gulag. And the Gurkha mercenary dogs were deployed to guard the place.