commiss direct februari adapt technic progress council direct juli approxim law member state relat brake devic categori motor vehicl trailer 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 act annex treati access member state eec eaec sign brussel januari articl thereof regard council direct juli approxim law member state relat brake devic categori motor vehicl trailer amend act annex treati access member state eec eaec sign brussel januari articl thereof accid occur due lock wheel rear axl empti truck tractiv unit articul vehicl equal lock wheel trailer semitrail brake road low adhes condit brake distribut excel vehicl laden found complet unsuit oper condit vehicl empti entail lock rear axl wheel motor vehicl wheel trailer axl low deceler vehicl combin vehicl skid jack knife light technic progress fit vehicl devic match brake effort load provis direct conform opinion committe adapt technic progress direct remov technic barrier trade motor vehicl sector adopt direct articl annex ii ix council direct eec juli modifi annex present direct articl effect octob member state ground relat brake devic oj oj pp oj oj pp refus eec type approv deliveri document refer articl subsect council direct eec februari nation type approv type motor vehicl prohibit entri servic vehicl brake devic type vehicl vehicl compli provis council direct eec juli amend direct januari onward member state longer deliv document envisag articl subsect council direct eec februari type vehicl brake devic compli provis council direct eec juli amend direct refus nation type approv type vehicl brake devic compli provis council direct eec juli amend direct effect octob member state prohibit entri servic vehicl brake devic compli provis council direct eec juli amend direct member state adopt publish provis order compli direct june forthwith inform commiss thereof articl direct address member state brussel februari commiss presid françoi xavier ortoli annex modif annex council direct juli eec annex ii brake test perform brake devic item read prejudic requir contain item road possess surfac good adhes item add item behaviour vehicl categori road surfac reduc adhes fulfil condit laid appendix appendix distribut brake effort vehicl axl gener requir vehicl categori fit wheel anti lock devic fulfil condit present appendix notat gt pic file quot quot gt adhes curv vehicl mean curv show adhes front axl rear axl plot vehicl brake ratio load condit requir motor vehicl axl vehicl load condit vehicl adhes curv front wheel rear wheel brake ratio case vehicl categori brake ratio case vehicl categori exept urban buse addit valu gt pic file quot quot gt condit fulfil automat semi trailer brake forc divid static weight trailer axl requir item interpret requir level effici higher laid annex ii pressur coupl head motor vehicl author draw trailer fit air brake affect oper pressur regul devic axl draw vehicl order verifi requir item manufactur provid adhes util curv front rear axl calcul formula gt pic file quot quot gt vehicl tractiv unit semi trailer graph plot load condit unladen run order driver board laden provis made possibl load distribut front axl heavili laden consider valu manufactur tractiv unit semi trailer solotract unit graph plot unladen vehicl run order driver board manufactur laden tractiv unit dynam load semi trailer tractiv unit repres static weight ps appli coupl kingpin equal ps pso pso repres differ maximum laden weight tractiv unit unladen weight gt pic file quot quot gt ho item hs height plane coupl semi trailer rest po unladen weight solotract unit po ps vehicl axl requir item appli vehicl axl requir consid met case brake ratio adhes front axl greater rear axl requir semi trailer requir appli semi trailer fit compress air brake brake system fit semi trailer curv repres brake ratio semi trailer axl plot servic line pressur measur coupl head hatch area attach diagram requir met permiss load condit semi trailer axl requir trailer requir appli trailer fit air brake appli singl axl trailer twin axl trailer axl spread metr requir set item appli twin axl trailer exclud requir contain trailer axl subject requir contain item condit fulfil case failur brake distribut system requir appendix met mean special devic control mechan suspens vehicl case failur devic control unit stop vehicl condit prescrib emerg brake mark vehicl categori meet requir appendix mean devic mechan control suspens vehicl mark show travel devic posit vehicl unladen laden state requir appendix met mean devic actuat compress air vehicl mark show pressur valu outlet side devic full brake vehicl unladen laden condit mark refer item affix visibl posit indel form vehicl inspect eec type approv test vehicl technic inspect author verifi conform requir contain present appendix carri test consid end report addit test append eec type approv certif gt pic file quot quot gt annex ix model commun eec type approv vehicl regard brake item item ad distribut brake axl vehicl vehicl fulfil requir contain appendix item