Spatial road transport emission data is fundamental for challenges of air pollution and climate change. In the existing European CAMS-REG (Copernicus Atmosphere Service-regional) inventory, several improvement opportunities exist, especially an underestimation in urban centers of ~35 %. We calculate emissions by combining gap-filled road information and emission factors, for the first time giving detailed emissions for most roads in Europe. With this, our dataset is much closer in line with independently combined city inventories.