That is a good point. I forgot they ran sixteen coach trains. I have just seen a video online now of four Guards despatching a long ICE train. So it seems that some trains can even have four Guards onboard.
Ah that is interesting to hear. I thought that Amtrack used radios but i was not sure quite how it worked. That seems like an odd choice of wording to use. I suppose that is probably a more North American term.
I have a feeling that on both NYC Subway trains and PATH trains (which is basically NYC Subway lines operated by another company) they both use the buzzer at the first station only. I think the Guard gives two buzzes and the Driver repeats two buzzes back too. In the cab photos you can see a buzzer by the Driver controls. When i have used them i am pretty sure i remember hearing it at the originating station but not at any other station. I am not sure why but it seems like it is used only at the first station on the line.
At other stations they seem to simply close their doors and remove the key. So the Driver presumably just departs as soon as they get the interlock light. From doing a bit of research online and looking at a few Wikipedia articles it says that when the Guard removes the key it gives the indication to the Driver that they are cleared to depart and this matches with videos online. So presumably when they remove the key it either gives the interlock light or some other light maybe.
In the beginning of this video taken at the first station on the line you can see the Guard press the buzzer button twice and then you can hear the Driver give two buzzes back:
So this confirms that at the first station they definitely use the buzzer and give two buzzes to each other.
On these videos all taken at intermediate stations you can see that the Guard simply closes the doors and removes their key and then the train departs with no buzzers used at all:
So it seems like at intermediate stations the Driver can just depart as soon as the Guard removes their key.
What is the point of just using the buzzer at the first stop? There must be a reason why they only do it at the first station on the line?
Surprisingly they do not have any doors and just simply lean out the window. In the UK that practice would not be allowed. I remember when i was a Guard we were told and reminded regularly to always fully step on to the platform as everything can be observed much better than just leaning out of your door. Even these days i am pretty sure all of our TOCs still require the Guard to fully step on to then platform.
Also interestingly on the NYC Subway only trains that have 6 carriages or more have a Guard onboard. All trains that have 5 carriages or less run DOO with the Driver only. So the shuttle services and some of the late night and weekend services on certain lines run in DOO operation.
On the Toronto Metro (on Line 1 and Line 2 only) they also have buzzers. According to a Wikipedia article they seem to be used at every stop unlike on the NYC Subway and PATH trains.
Caltrain have a buzzer button the panels of their new Stadler Kiss trains but it seems like it is not used at all:
https://youtu.be/Fu4R2plx6C0
In this video you can see the buzzer is not used. So the Guard simply closes the doors and presumably the Driver just departs as soon as they get the interlock light.
Metro North and Long Island Rail Road both seems to use Guard buzzers too (at least on the multiple units) and they use the same two buzzes as we do as can be heard in this video:
https://youtu.be/ns4QBT4Gg9c
It seems that the Guard gives two buzzes and the Driver gives two buzzes back. Also unlike the NYC Subway and PATH trains it seems that they use the buzzer at every stop.
It seems like on a lot of trains in the USA (at least on the NYC Subway and PATH and Metro North and Long Island Rail Road trains) the Driver can hear the Guards buzzer and the Guard can hear the Drivers buzzer but they can not hear their own buzzers. It seems that when the Guard presses the buzzer it only sounds in the Drivers cab and when the Driver presses the buzzer it only sounds in the Guard panel. It is weird that they can not hear their own buzzes. In the UK we always can. I wonder if there is a reason for this? Why do they play no sound for their own buzzes?
On a lot of other suburban trains they seem to have buzzer buttons but i am not sure that they are always used. I have found photos of the Guard panels and they all seem to have a buzzer button even if they are not used. Amtrack have buzzer buttons on the coaches of their North East corridor trains but they do not seem to use them. MBTA Boston Commuter Rail, New Jersey Transit Commuter Rail, MARC Maryland Commuter Rail, Caltrain, Metrolink, many other commuter rail services, all seem to have buzzer buttons but i have a feeling they might only be used on multiple units and when the control car is leading on push pull sets. I doubt the locomotives have any ability or cables to enable buzzers? That is probably why they are often not used?
So it certainly seems to vary a lot in the USA as to what is used. But some of them certainly use the same buzzer method that we use. I wonder who started the buzzes to depart method first. Did this originate in the UK and then spread to the USA later on.