by railfan365
R36 Combine Coach wrote:Another advantage of single units is that they are practical for work service, compared to multicar linked sets. R17/21/22s which make many work cars were all single unit cars and the World's Fair R33 single units are used as well. However "paired" Main Line R33s and some World's Fair R36s can also be found in work duty as well.I've also seen R-40's and R-40M's in work car status - powering garbage trains.
Also, an advantage of singe units is greater flexibility in train length.