An experimental <a href="https://en.wikipedia.org/wiki/Controlled-access_highway#United_Kingdom" class="extiw" title="w:Controlled-access highway">motorway</a> symbol proposed by the <i>Motorway Signs: Final Report of Advisory Committee for Traffic Signs on Motorways</i> (Anderson report) as an alternative to the <a href="https://en.wikipedia.org/wiki/United_Nations_Economic_Commission_for_Europe" class="extiw" title="w:United Nations Economic Commission for Europe">Economic Commission for Europe</a>'s proposed <a href="//commons.wikimedia.org/wiki/File:Vienna_Convention_road_sign_E5a-V1.svg" title="File:Vienna Convention road sign E5a-V1.svg">motorway symbol design</a>. Members of the Anderson report disliked the ECE's proposed sign, due to it's tall rectangular shape, "over-representational", readability from a distance and lacked "instant impact". <br>Eventually this symbol was replaced with the <a href="//commons.wikimedia.org/wiki/File:UK_motorway_symbol.svg" title="File:UK motorway symbol.svg">current 'motorway' symbol</a>, which the committee had reworked to some satisfaction.
<a href="https://en.wikipedia.org/wiki/Department_for_Transport" class="extiw" title="w:Department for Transport">Ministry of Transport</a>
1962
<a rel="nofollow" class="external text" href="https://archive.org/details/op1265801-1001"><i>Motorway Signs: Final Report of Advisory Committee for Traffic Signs on Motorways</i></a> - 1962.