Pollution fears rise as traffic surges in Scottish cities New data shows that traffic levels in Edinburgh and Glasgow have exceeded pre-pandemic levels, adding to fears about air quality following delays to Scotland’s planned Low Emission Zones (LEZs). The data, sourced by Siemens Mobility Limited in partnership with HERE Technologies, shows that daily traffic in Edinburgh is 7% higher in comparison to February 2020, with Glasgow recording traffic levels 4% higher than before the pandemic. Siemens said that with the Scottish Government easing COVID-19 restrictions with plans to open up the country further in the coming weeks, there are concerns about further increases in air pollution.