What additional lights must be on when dipped headlights are activated?

When dipped headlights are activated, it's essential to also have the two sidelights on in addition to the dipped headlights. The requirement for the sidelights ensures that your vehicle is visible to others, especially during low-light conditions, such as twilight or in poor weather. The inclusion of sidelights contributes to the overall visibility of your vehicle from the side and rear, enhancing safety on the road.

While the back red lights are always illuminated when the vehicle is in motion, they are not an additional requirement when dipped headlights are on. Fog lights are typically used in specific conditions, such as heavy fog, and are not meant to be used in conjunction with dipped headlights unless visibility is severely compromised. Having just the dipped headlights on does not meet all the visibility requirements for safe driving. Therefore, maintaining the sidelights along with the dipped headlights is crucial for ensuring you are seen by other road users, effectively reducing the risk of accidents.