Skybus
... that Pittsburgh, Pennsylvania's proposed Skybus rapid transit system became an issue in the 1969 mayoral campaign?
... that <a class="mw-redirect" href="./Pittsburgh,_Pennsylvania" id="mwDfk" rel="mw:WikiLink" title="Pittsburgh, Pennsylvania">Pittsburgh, Pennsylvania</a>'s proposed <b id="mwDfo"><a href="./Transit_Expressway_Revenue_Line" id="mwDfs" rel="mw:WikiLink" title="Transit Expressway Revenue Line">Skybus</a></b> <a href="./Rapid_transit" id="mwDfw" rel="mw:WikiLink" title="Rapid transit">rapid transit</a> system became an issue in the 1969 mayoral campaign?