What precaution can cyclists take to be more visible to drivers?

Wearing reflective gear is a highly effective precaution for cyclists to enhance their visibility to drivers. Reflective materials catch and reflect light, making cyclists easier to see, especially in low-light conditions or at night when the visibility is reduced. This is crucial for safety on the roads, as it alerts drivers to the presence of cyclists, thereby reducing the risk of accidents. Wearing bright colors and reflective accessories helps ensure that cyclists stand out against different backgrounds and in varying weather conditions.

The other options do not provide the same level of effectiveness in increasing visibility. Hand signals, while important for communication with drivers, do not enhance a cyclist's visibility in the way that reflective gear does. Riding in the middle of the lane can be risky and doesn’t necessarily improve visibility to drivers. Finally, only riding after sunset limits cycling to a time when visibility is already poor, rather than addressing visibility issues proactively throughout all times of the day.