I've worked on TCAS (collision avoidance for airplanes) in the past. The system will alert the pilot and ask them to do a specific route (such as climb, descend, do-not-climb). It's up to the pilot to respond (est. 2-5 seconds reaction time). The route decided upon by the airplane is in conjunction with the other plane.
Thank you for your input! I'm glad memory serves me mostly correctly every once in a great while. Will the TCAS or a related system take corrective action if the pilot does not?