Que other usage

Question

I’ve been trying to find a lesson note on this. Que ya voy = im already going. What is the role of the word ‘que’ in this sentence? I only found notes about que as command or exclamation or as conjunction. Can anyone enlighten me on this usage of que and its meaning?

Inma Sánchez · Accepted Answer

Hola Ashlyn
It'd be necessary to see the context where you found that sentence, but it looks like a "que" that is simply emphasising what is said next, there is no straight forward meaning for that que, really. This is why we don't have a lesson on that specific use. It is colloquial. 
Que ya voy... could be said by someone that has already been asked to go somewhere; imagine a toddler calling her mum lots of times while she is busy and trying to ignore the toddler; when the mum finally gets a chance to go play with the toddler she finally says "que ya voy..." - that que would be emphatic. 
I hope it clarified it. 
You may be interested in this other use of que, which is similar: 
Que introducing a warning or a threat in Spanish
Saludos