This study investigates the evolution of social segregation in Hong Kong from 1992 to 2011 using three Hong Kong Travel Characteristics Surveys. It examines the roles of different transport modes, metro extensions, and longitudinal changes in shaping social mixing. The findings reveal persistent unequal experiences of social segregation across income groups, but public transit, particularly buses and the metro, significantly increases social mixing. However, a selection bias in new metro station locations, favoring already well-mixed areas, is observed. Metro expansion shows a paradoxical effect: decreasing low-income populations in immediate catchment areas while increasing overall trip diversity.

Becky P. Y. Loo, Zhuangyuan Fan, Esteban Moro