Quantifying responses to the expansion of the Ultra Low Emission Zone in London


Ultra Low Emission Zone (ULEZ) is a major policy initiative aimed at improving air quality by restricting polluting vehicles in London. To better understand the impact of ULEZ and its expansion on human mobility, we employ a Difference-in-Differences (DiD) approach using mobile phone location data to estimate the causal effect of the ULEZ expansion on the number of activities and travel distance of London residents. Results indicate that the ULEZ expansion has decreased both indices in both Inner London and the Greater London area.

Jul 19, 2023 — Jul 21, 2023
London, UK
Yikang Wang
Yikang Wang
PhD Student

Centre for Advanced Spatial Analysis (CASA), UCL