Fog lights should be used in severe weather conditions with visibility below 200 meters, such as dense fog, heavy rain, heavy snow, or sandstorms. In these situations, activating both front and rear fog lights enhances vehicle conspicuity and improves road illumination. Based on visibility classification, when visibility ranges between 100 and 200 meters, fog lights must be used in conjunction with dipped headlights and position lamps, with vehicle speed maintained below 60 km/h and a minimum following distance of 100 meters. If visibility drops below 50 meters, it is advisable to activate all lighting systems, limit speed to under 40 km/h, and comply with potential traffic control measures implemented by authorities. Fog light usage is strictly prohibited during clear weather or good visibility conditions, as their intense glare may dazzle oncoming drivers and constitutes a traffic violation punishable by a RM50 fine and 1 penalty point. Fog light controls typically employ rotary knobs or push-button designs, requiring prior activation of position lamps or dipped beams. Certain vehicle models necessitate sequential activation of front/rear fog lights via instrument panel buttons or multi-function light stalks. Regular maintenance should verify fog light operational status and lens cleanliness to ensure emergency functionality, while rear fog lights must be deactivated during oncoming traffic or when following other vehicles to prevent glare disturbance.
