Final answer:
Good judgement in traffic primarily involves searching ahead to anticipate hazards and make informed decisions, which is more fundamental than reacting to threats with sudden maneuvers.
Step-by-step explanation:
To make good judgement in traffic, the essential step you need to take is to search ahead. This skill is central for anticipating potential hazards and making informed decisions to avoid accidents. Being able to swerve and knowing how to stop quickly are indeed important skills, but they come into play after you have already identified a potential threat on the road. It's the ability to look ahead and assess the traffic situation that allows you to prevent emergencies from arising in the first place, thus giving you the option to safely navigate the traffic.