TABLE 9 LOS Designation in the Highway Capacity Manual (1994),,,,, Level of service,Stopped time per vehicle (STV; seconds/vehicle),,,, A,STV £ 5,,,, B,5 < STV £ 15,,,, C,15 < STV £ 25,,,, D,25 < STV £ 40,,,, E,40 < STV £ 60,,,, F,STV ³ 60,,,,