A shift=AM P shift=PM E shift = Extended - starts work at 5-6 plus and ends at 8.45-10 with a short swing den starts at 12 till the end of PM peak S shift = Split... starts at 5-7plus, ends halfway at about 10-11plus and has a swing of about 3-4hours and starts again from 2plus-8plus... T shift= 3quarter...starts at 8-10plus alll the way to the end of the PM peak.. with no swing...
tintinspartan
I think that feeder services uttilizes normal AM and PM shifts. 191 is one exception. For high demand services like 7, 10 or 30, they may have a variety of shifts.