Factors K1 and K2 are between the value of time and the value of delay, as estimated by stated preference studies, to take into account that the time lost as a result of delays is perceived significantly more negatively than normal travel time.
Faktorid K1 ja K2 asuvad aja ja hilinemise väärtuse vahepeal, nagu eelistuste uuringus on prognoositud, võttes arvesse, et viivitustest tingitud ajakaotust tajutakse tavapärasest sõiduaja kaotusest negatiivsemalt.