Certainly looks like it. I wonder how long it takes one guy to apply say 40/100 handbrakes on a mile-long train in the middle of the night on an unlit section of track after a long, boring shift? Especially if the train is parked on an uphill gradient (assuming the brakes are applied on the downhill end of the train) and he has to walk the entire length of the train. Not a 10 minute job I imagine.
When you are dealing with such long trains, especially single-manned, there seems to be a good case for a simple system to apply all the handbrakes using electric motors, although that does introduce a potential electrical hazard for flammable loads ...