What is an effective way for a driver to remain alert on a long journey?

Stopping, parking in a safe place, and having a cup of coffee is an effective way for a driver to remain alert during a long journey because it addresses fatigue and reinforces mental alertness. When driving for extended periods, fatigue can set in, leading to decreased concentration and slower reaction times. Taking a break not only allows the driver to rest but also provides an opportunity to refresh themselves with caffeine, which is known to help increase alertness temporarily.

In contrast, listening to loud music might not be effective for everyone, as it could lead to distractions rather than sustained attention on the road. Continuing to drive without breaks can significantly increase the risk of drowsiness, as fatigue compounds over time, ultimately increasing the chances of an accident. Eating a heavy meal, while it may seem energizing at first, can often lead to drowsiness instead of alertness due to the body's energy being diverted towards digestion, leaving the driver more likely to feel tired. Therefore, the chosen answer is not just practical but also promotes safe driving practices during long journeys.