Using EathSense Zephyrs, the concentrations of NO2, O3 and PM2.5 was measured on morning commutes accros 4 routes in Leicester. The data file Commuter pollutant concentrations by route min averaged.csv shows meadured concentrations of these pollutants along the commutes for people either walking, driving or cycling, averaged to 1- minute time resolution (Commuter pollutant concentrations by route min averaged.csv).