M2 = Passenger circulation rate for surge flows, assumed to be 25 people/m/min [LOS C/D threshold is 15 people/min per foot of effective width]
F = Friction factor (equals 1.0 for one-way or evenly balanced flows; ranges up to 1.2 for unbalanced flows)
B = Buffer Zone: 1.6 ft (0.5 m) for walls and railings, 4.9 ft along commercial space. 3.3 ft at platform edge
Non-public circulation spaces shall be sized according to local codes.
All sizing shall comply with NFPA 130 which takes precedence over other guidance.