commiss direct juli adapt technic progress council direct eec approxim law member state relat permiss sound level exhaust system motor vehicl eec commiss european commun regard treati establish european econom commun regard council direct eec februari approxim law member state relat type approv motor vehicl trailer amend direct eec articl thereof regard council direct eec februari approxim law member state relat permiss sound level exhaust system motor vehicl amend direct eec articl thereof result experi gain field view present state art modifi requir relat method measur nois emit type vehicl order bring line actual oper condit vehicl concern high perform vehicl vehicl automat transmiss equip manual overrid type high perform vehicl import characterist built advanc techniqu preced method subsequ seri product optim part characterist activ passiv safeti air pollut nois emiss fuel consumpt oper vehicl concern present method determin permiss sound level design reveal amount nois emit vehicl oper urban traffic condit latest experi repres actual high perform vehicl urban traffic condit modif order obviat disadvantag permit accur assess nois emit type vehicl adopt unit nation econom commiss europ regul recent amend provis direct accord opinion committe adapt technic progress direct remov technic barrier trade motor vehicl sector adopt direct articl annex direct eec amend direct eec amend accord annex direct articl effect octob member state ground relat permiss sound level exhaust system refus respect type motor vehicl grant eec type approv issu document refer indent articl direct eec grant nation type approv prohibit entri servic vehicl sound level exhaust system type vehicl vehicl concern conform provis direct eec amend direct effect octob member state longer issu document refer indent articl direct eec respect type motor vehicl sound level exhaust system compli provis direct eec amend direct refus grant nation type approv respect type motor vehicl sound level exhaust system compli provis direct eec amend direct effect octob member state prohibit entri servic vehicl sound level exhaust system compli provis direct eec amend direct articl member state bring forc provis compli direct octob forthwith inform commiss thereof articl direct address member state brussel juli commiss karl heinz narj member commiss oj oj oj oj annex amend annex direct eec point replac approach speed vehicl approach line aa steadi speed lower speed speed engin speed equal quarter speed engin develop rate maximum power km case vehicl equip automat transmiss discret ratio chang gear test manufactur select test procedur speed vehicl increas maximum km order avoid chang speed remain km fuel suppli engin limit suppli full load condit consid satisfi case spark ignit engin angl throttl open case compress ignit engin movement central rack inject pump limit travel vehicl equip automat transmiss manual overrid test approach speed km quarter maximum road speed lower test result obtain speed produc maximum sound level point replac vehicl categori equip manual oper gearbox forward gear ratio test gear vehicl categori equip manual oper gearbox forward gear ratio test gear success gear ratio intend normal road consid arithmet sound level record condit calcul vehicl categori forward gear equip engin develop maximum power greater kw permiss maximum power maximum mass ratio exce kw test gear provid speed rear vehicl pass line bb gear greater km point replac automat transmiss equip manual overrid test conduct selector posit recommend manufactur quot normal quot drive