Research Article

Traffic Allocation Mode of PPP Highway Project: A Risk Management Approach

Table 8

The Vensim equation and valuation of road impedance of every highway.

NumberThe parameter nameVensim equationValuation
Xicheng highwayShanghai-Nanjing highwayChangzhou-Hefei highwayNantong-Wuxi highway

1Section travel timeSECTRTIME =SECLEG/SECSPEED.K
SECSPEED=alfi1SECDSPEED.K/(1+SECTRLOAD.K^ betai)
SECLEG1=24
SECDSPEED1=120
SECLEG2=25
SECDSPEED2=120
SECLEG3=25
SECDSPEED3=120
SECLEG4=28
SECDSPEED4=120

2Section tollSECTOLL =SECLEGTRATETRATE1=0.45TRATE2=0.45TRATE3=0.60TRATE4=0.55

3The petrol price of cars per hundred kilometersCARPPRI =PETRPRICARPCONSMPETRPRI=1.527+Time0.3487CARPCONSM=8.5/100

4The car time valueCARTVLUE22

5Time cost coefficientai1.K =TABLE (Tai1, TFi.K, 0, 1, 0.1)Ta11=1.03/1.12/1.21/1.30/1.39/1.48/1.57/1.63/1.66/1.70
If TIME10, TF1=TIME/10, Else TF1=1
Ta21=1.38/1.46/1.55/1.64/1.69/1.72/1.72/1.72/1.72/1.72
If TIME10, TF2=TIME/10, Else TF2=1
Ta31=0.69/0.78/0.87/0.96/1.05/1.13/1.22/1.31/1.40/1.49
If TIME10, TF3=TIME/10, Else TF3=1
Ta41=0.35/0.44/0.53/0.62/0.70/0.79/0.88/0.97/1.06/1.15
If TIME10, TF4=TIME/10, Else TF4=1

6Comfort coefficientγi.K =TABLE (Tgamai, TFi.K, 0, 1, 0.1)Tγ1=0.98/0.89/0.79/0.70/0.61/0.52/0.43/0.37/0.33/0.29
If TIME10, TF1=TIME/10, Else TF1=1
Tγ2=0.63/0.53/0.44/0.35/0.30/0.28/0.28/0.28/0.28/0.28 If TIME10, TF2=TIME/10, Else TF2=1Tγ3=1.33/1.24/1.14/1.05/0.96/0.87/0.78/0.69/0.59/0.50
If TIME10, TF3=TIME/10, Else TF3=1
Tγ4=1.68/1.59/1.50/1.40/1.31/1.22/1.13/1.04/0.95/0.85
If TIME10, TF4=TIME/10, Else TF4=1

7Charging impedance coefficientai2.K =TABLE (Tai2, TFi.K, 0, 1, 0.1)Ta12=1.27/1.25/1.24/1.22/1.20/1.17/1.15/1.12/1.09/1.06
If TIME10, TF1=TIME/10, Else TF1=1
Ta22=1.45/1.43/1.41/1.39/1.35/1.31//1.24/1.17/1.10/1.02If TIME10, TF2=TIME/10, Else TF2=1Ta32=1.10/1.08/1.06/1.04/1.02/1.00/0.97/0.95/0.92/0.89
If TIME10, TF3=TIME/10, Else TF3=1
Ta42=0.92/0.91/0.89/0.87/0.85/0.82/0.80/0.77/0.75/0.72
If TIME10, TF4=TIME/10, Else TF4=1

8Fuel consumption coefficientai30.90.90.80.8