Trip toll cap

[FlaviaTsang]

For SOV:

Original expression: c_cost*SOVTOLL_VTOLL[tripPeriod]*if(hhIncomeQ1=1, %Means_Based_Tolling_Q1Factor%, 1)*if(hhIncomeQ2=1, %Means_Based_Tolling_Q2Factor%, 1)

New expression, which has 3 parts:

• Drive alone toll - Value toll - hhIncomeQ1: c_cost*(hhIncomeQ1)*min(%TripTollCap_Q1%, SOVTOLL_VTOLL[tripPeriod])*%Means_Based_Tolling_Q1Factor%
• Drive alone toll - Value toll - first X% of hhIncomeQ2: c_cost*(hhIncomeQ2_firstXpercent)*min(%TripTollCap_firstXpercentOfQ2%, SOVTOLL_VTOLL[tripPeriod])*%Means_Based_Tolling_Q2Factor%
• Drive alone toll - Value toll - rest of the hhlds: c_cost*if((hhIncomeQ1=1), 0, 1)*if((hhIncomeQ2_firstXpercent=1), 0, 1)*SOVTOLL_VTOLL[tripPeriod]*if(hhIncomeQ2=1, %Means_Based_Tolling_Q2Factor%, 1)