I don´t know if there´s any, in fact the sign X there stands for crossing or something emcompassing like a hug (they use it for hug [X] and kiss [O]; hence XOXO - hugs and kisses.

    As for the way they say PED XING aloud (if any) I don´t know; it´s a novelty to me.

    Let´s wait somebody else to clear up our doubt, then.

   PP.