c_rf1 = 548.6

c_rv6 = 7.5

d_rail = 123.14

c_rf2 = 782.13

c_re = 0.21014

d_road = 25 or 140

c_rv1 = 4.29

c_vhandling1 = 257

s = 110 or 60

c_rv2 = 0.0045

c_vhandling2 = 14.22

s_40ft = 0.6934

c_rv3 = 0.18

c_ft = 374

s_20ft = 0.3066

c_rv4 = 0.88

c_vt1 = 4.6

c_rv5 = 0.661

c_vt2 = 5.52