What is the direct consequence of driving with dirty vehicle light surfaces or headlights?

Question

DentroTest · Accepted Answer

The correct answer is that lighting loses effectiveness. When the glass or cover of the headlights accumulates dirt (mud, dust, insects, etc.), this opaque layer absorbs a significant part of the emitted light and scatters the rest. This causes the light beam to be shorter and less intense, drastically reducing the driver's visibility and the ability to be seen by others. It does not prevent dazzling (scattered light could even be more bothersome unpredictably), and it certainly does not improve visibility. Traffic regulations require keeping lighting and optical signaling systems clean and in good condition.

What is the direct consequence of driving with dirty vehicle light surfaces or headlights?

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