What should drivers do if they encounter heavy traffic?

Choosing to plan beforehand and select a less busy route is the most effective strategy when encountering heavy traffic. This approach involves evaluating and considering alternative pathways that are likely to be less congested, which can reduce travel time and alleviate stress. By having a plan and being proactive, drivers can navigate through or around heavy traffic situations more efficiently.

In addition, planning can include checking traffic updates and using navigation apps that provide real-time information about road conditions. This prevents frustration and contributes to safer driving behaviors, as it minimizes the temptation to react impulsively to traffic situations.

The other options suggest unsafe or irresponsible driving practices. Driving recklessly can not only endanger the driver but also other road users, while constantly changing lanes can increase the likelihood of accidents. Ignoring traffic signals disregards the rules of the road, which are in place to ensure the safety of all. Thus, advancing preparedness and selecting alternative routes is essential for safe and efficient driving in heavy traffic.