Original sentence: In cases where the airport features multiple terminals which are far apart or not physically connected, and where there exists no people mover or other transfer alternative, a free transfer bus may be employed to transfer connecting passengers from one terminal to another.. Terminal transfer may also be incorporated into public transport bus networks
Edited sentence: In cases where the airport features multiple terminals which are far apart or not physically connected, and where there exists no people mover or other transfer alternative, a zero-fare transfer bus may be employed to transfer connecting passengers from one terminal to another.. Terminal transfer may also be incorporated into public transport bus networks