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In the countries where there are no road medians of sufficient height to protect opposite direction vehicle headlight, drivers find lot of glaring.

Using one type of polarization (horizontal/vertical) film for vehicle head lights and drivers wearing opposite polarization glasses will help.


DisAdv:

1) amount of polarized light will be lesser than the total light that head light produced. so lower electricity->Light efficiency

2) amount light the driver see is relatively low, hence lower the visibility