They missed the more common trick - send one of the trailing trains express to fill the gap.
That only works when you have an express track or 3 tracks.
That's why I thought it was boneheaded for the NYC MTA to switch from 3 tracks to 2 tracks for the new 2nd Ave line, for a savings of only $25M. It's a huge utility cut, losing peak-direction express service and the ability to bypass stalled trains.
You can do it even with just one track - one train skips a bunch of stations.
That only works when you have an express track or 3 tracks.
That's why I thought it was boneheaded for the NYC MTA to switch from 3 tracks to 2 tracks for the new 2nd Ave line, for a savings of only $25M. It's a huge utility cut, losing peak-direction express service and the ability to bypass stalled trains.
You can do it even with just one track - one train skips a bunch of stations.