Buses in Oxford city centre must meet the Euro V emissions standard after the UK’s third low emission zone (LEZ) entered force on 1 January.
The LEZ was announced by Oxford City Council in March 2009. The rules were phased in over five years through a voluntary agreement with bus firms.
Buses entering central Oxford must now meet the Euro V standard for emissions of nitrogen oxides (NOx). Buses can be retrofitted to meet the rules.