14 hours ago, Neeranam said:

The culturally correct thing to do is lower the head to show thanks.

....... what ?...... and take my eyes off the road for a split second..... !!!!  I doubt if they'll see my 'lowered' head   through their blacked out mirrored finished tinted windows adorned with all the bunches of ecclesiastical nick knacks hanging from their rear view mirror !!

Edited October 4, 20178 yr by Humpy

5 hours ago, Humpy said:

....... what ?...... and take my eyes off the road for a split second..... !!!!  I doubt if they'll see my 'lowered' head   through their blacked out mirrored finished tinted windows adorned with all the bunches of ecclesiastical nick knacks hanging from their rear view mirror !!

But they see your hand wave?

I have tinted window, they are designed so they can't be seen through , BUT only one way!

How can you see their knick-knacks?