London mayor gets LGVs off the LEZ hook

London Low Emission Zone

London mayor Boris Johnson has abandoned plans to introduce a Euro-4 NOx standard for trucks operating in the London Low Emission Zone (LEZ) in 2015, but buses will still have to comply. The current phase 4 of the LEZ demands that trucks and buses meet only the particulates requirements of Euro-4, so older vehicles have been able to qualify by fitting filters that cut particulates but do nothing for NOx limits. However, phase 5, due to start in less than […]