EMAS
...that the EMAS has been so effective in monitoring traffic conditions on Singapore's expressways that the LTA removed most SOS telephones from the expressways as a result?
...that the <b id="mwBI4"><a class="mw-redirect" href="./Electronic_Monitoring_and_Advisory_System" id="mwBI8" rel="mw:WikiLink" title="Electronic Monitoring and Advisory System">EMAS</a></b> has been so effective in monitoring traffic conditions on <a href="./Singapore" id="mwBJA" rel="mw:WikiLink" title="Singapore">Singapore</a>'s <a href="./Expressways_of_Singapore" id="mwBJE" rel="mw:WikiLink" title="Expressways of Singapore">expressways</a> that the <a href="./Land_Transport_Authority" id="mwBJI" rel="mw:WikiLink" title="Land Transport Authority">LTA</a> removed most <a href="./SOS" id="mwBJM" rel="mw:WikiLink" title="SOS">SOS</a> <a href="./Telephone" id="mwBJQ" rel="mw:WikiLink" title="Telephone">telephones</a> from the expressways as a result?