FRANCENE Callueng reports that Expressway customers expressed unending joy over the waiving of toll on December 24 and 31 at SMC Infrastructure’s SLEX (South Luzon Expressway), STAR (Southern Tagalog Arterial Road), NAIA Expressway and TPLEX (Tarlac-Pangasinan-La Union Expressway). Unearned revenues in the millions were gifts “from the heart” in the…