A system of lamps, discs, or illuminated alphanumeric panels displayed on the front of a locomotive to broadcast the train's classification or specific schedule number to dispatchers and tower operators. It allows lineside staff to identify an approaching train and route it accordingly.
Heard on the job
Make sure the headcode is set correctly before we pull out of the yard.
Insider tip
North American railroaders typically refer to classification lights or number boards rather than headcodes, though the concept of front-end train identification is identical.