Arnos Park Viaduct
... that the 34 arches of the Arnos Park Viaduct allowed the extension of the Piccadilly line to Cockfosters?
... that the 34 arches of the <b id="mwBU0"><a href="./Arnos_Park_Viaduct" id="mwBU4" rel="mw:WikiLink" title="Arnos Park Viaduct">Arnos Park Viaduct</a></b> <i id="mwBU8">(pictured)</i> allowed the extension of the <a href="./Piccadilly_line" id="mwBVA" rel="mw:WikiLink" title="Piccadilly line">Piccadilly line</a> to <a href="./Cockfosters_tube_station" id="mwBVE" rel="mw:WikiLink" title="Cockfosters tube station">Cockfosters</a>?