train
We must train train conductors to handle emergencies.
The sentence states that we must educate locomotive operators to handle emergencies.

Meanings (pronounced /treɪn/)
to teach a particular skill or type of behavior through practice and instruction
- Coaches train athletes to peak performance.
- He trains dogs for search and rescue.
a series of connected railroad cars pulled by a locomotive
- The train arrives at platform six.
- Cargo trains can be over a mile long.
Word origin
From Old French train ('a drawing out, a procession'), from trainer ('to drag, draw'), from Vulgar Latin *traginare. The verb sense ('to instruct') is more modern and metaphorical — to 'train' a person originally meant to lead or draw them through a course of practice, like leading a horse on a leash. The noun (the locomotive train) developed from the literal 'thing being drawn' — a string of cars drawn by a steam engine.
Fun fact
The verb 'to train' and the noun 'train' (the locomotive) are the same word — both come from the metaphor of 'drawing along.' To train a person is to draw them along a course of practice; a railway train is a string of cars being drawn along the rails. Both descend from Old French trainer, 'to drag.'