When to dip headlights?

When to dip headlights?

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Zetec-S

Original Poster:

5,890 posts

94 months

Friday 9th November 2018
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Serious question about when to dip headlights at night. Obviously it's largely down to common sense, and I tend to use the rule that if I can see the other cars headlights (or am just about to see them) then I dip mine.

My question is more related to longer, straight sections of road. For example here:

https://www.google.co.uk/maps/@50.9437318,-1.97547...

Not the busiest road, especially at night, so quite often an opportunity/requirement to use full beams. But if you saw a car approaching in the very far distance (the best part of a mile away) would you dip straight away or leave it a few seconds on the basis it's too far away to dazzle and it means you have better visibility for longer? And similarly, if you were gaining on a car travelling in the same direction would you wait until closer or dip as soon as you see taillights?

Likewise, if you're catching up with a cyclist would you dip until you've overtaken, on the basis that if they need to check behind then you won't be dazzling them (so much)?