Caption: CN's rebuilt RDC track inspection car 1501 heads down the Hagersville sub on a perfect March morning. Doing some research on 1501's history, a wonderful article was done by a gentleman named Steve Boyko about 1501's past.( link here https://blog.traingeek.ca/2016/08/cn-1501-finally.html) " CN 1501 was originally a CN RDC-1, labelled D-108, built in 1958 for passenger service. As an RDC-1 it had coach seats only. All RDCs, except for the RDC-5/9, have two diesel engines driving the wheels, so they are self-propelled and have operator controls at each end. D-108 was renumbered to CN 6108 in March 1969, then became VIA 6108 in March 1978. I'm not sure when CN acquired it from VIA but it was rebuilt into a rail test vehicle and was in service as CN 15016 in 2010. I heard it was fairly quickly renumbered to CN 1501 when it was realized that CN's dispatching software only accepted four digits for a locomotive number " I may be too young to have witness the rise and fall of the RDC, but 1501 is good enough for me.