Original sentence: Some stations have remotely-opened or even automated gates that bar riders from approaching the monorail track (and, thus, any approaching or departing train) until the operators have determined that it is safe to allow people to board the train
Edited sentence: Some stations have remotely-opened or even automated gates that bar riders from approaching the monorail beamway (and, thus, any approaching or departing train) until the operators have determined that it is safe to allow people to board the train