 1IND     = VARIABLES INDEPENDANTES          INDEPENDENT VARIABLES
 0Ti      DEPLACE. DE ORIG_i A toute DEST.   TRIPS FROM ORIG_i TO ALL DEST.
 0Tj      DEPLACE.DE TOUTE ORIG.A toute DEST.TRIPS FROM ALL ORIG. TO DEST_j
 0TiTj    PRODUIT Ti*Tj                      PRODUCT Ti*Tj
 0INCOME  REVENU                             INCOME
 0Util_BC4UTILITE de la VARIANTE bus_bc4     UTILITY from VARIANT bus_bc4
 0constantCONSTANTE DE LA REGRESSION         REGRESSION CONSTANT

