Is this sentence true? if not, how can it be said ?
He controls human and vehicle traffic where he works

Question

Answer

Hi Caner,

I assume you would like to tell about someone´s duties at work.

I would suggest to express in the way:
He is responsible for controlling the vehicle traffic. OR
His duty is to control the vehicle traffic.

I do not really understnad what is human traffic then...

Hope I helped a bit
Take care