 1N       = VARIABLES DE RESEAU              NETWORK VARIABLES
 0RAI_CTT COUT TOTAL, RAIL(COUT TRAJET+ACCES)TOTAL COST, RAIL(RUN + ACCESS COST)
 0RAI_TTT TEMPS DE TRAJET TOTAL, RAIL        TOTAL TRAVEL TIME, RAIL
 0RAI_FR  FREQUENCE, RAIL                    FREQUENCY, RAIL
 0AIR_CTT COUT TOTAL, AIR (COUT TRAJET+ACCES)TOTAL COST, AIR (RUN + ACCESS COST)
 0AIR_TTT TEMPS DE TRAJET TOTAL, AIR         TOTAL TRAVEL TIME, AIR
 0AIR_FR  FREQUENCE, AIR                     FREQUENCY, AIR
 0BUS_CTT COUT TOTAL, BUS (COUT TRAJET+ACCES)TOTAL COST, BUS (RUN + ACCESS COST)     
 0BUS_TTT TEMPS DE TRAJET TOTAL, BUS         TOTAL TRAVEL TIME, BUS
 0BUS_FR  FREQUENCE, BUS                     FREQUENCY, BUS
 0CAR_C   COUT, AUTO (COUT DE TRAJET)        COST, CAR (RUN COST)
 0CAR_RT  TEMPS DE TRAJET, AUTO              RUN TIME, CAR

 2S       = VARIABLES SOCIOECONOMIQUES       SOCIOECONOMIC VARIABLES
 0INCOME  REVENU                             INCOME

 3ET      = ET CETERA                        ET CETERA
 0CONSTANTCONSTANTE DE LA RGRESSION         REGRESSION CONSTANT

