[james]

Is it legal to put some sort of text display device on car windows or
windshield? E.g. a LED sign that can display "thank you", "please", "want to
pass", ...

If it is not legal on windows, how about a text display near the bumper, on
the trunk, or the hood?

Currently, cars are designed with a honk that annoys many drivers, but there
is no way to send a polite message. That's why there are so many road rages.

[Richard Crowley]

"james" wrote...
Is it legal to put some sort of text display device on car windows or
windshield? E.g. a LED sign that can display "thank you", "please", "want
to pass", ...

If it is not legal on windows, how about a text display near the bumper,
on the trunk, or the hood?

Currently, cars are designed with a honk that annoys many drivers, but
there is no way to send a polite message. That's why there are so many
road rages.

I have seen commercial products like this in the past.
They didn't seem to become very popular? Price??
Dunno that I ever heard that they were illegal, though.