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<p>The Department monitors contributory factors to road collisions in GB through data
recorded by police officers attending the scene. LED headlights are increasingly common
in modern vehicles. Despite this, between 2010 and 2020, dazzle from headlights is
recorded as a contributory factor in less than half a percent of collisions and, overall,
there is no discernible trend or increase over this period.</p><p> </p><p>Prior to
registration, vehicle manufacturers must supply evidence that their vehicles comply
with international road vehicle approval regulations. Provisions for vehicle headlamps
define maximum and minimum intensity, light pattern and position on the vehicle. Domestic
legislation also prohibits the use of headlamps that cause undue dazzle or discomfort
for other road users. However, due to variations in road geometry there will be unavoidable
instances where oncoming vehicles can cause momentary dazzle or discomfort and the
Highway Code advises drivers to slow down or stop if necessary.</p><p> </p><p>The
Department’s officials continue to support international activity reviewing the relevant
vehicle lighting standards.</p><p> </p>
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