 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
 0CONSTANT  CONSTANTE DE LA RGRESSION         REGRESSION CONSTANT

