Directional blinkers

I’ve pulled quite a few trailers that I couldn’t see them. On the pneumatics I pulled the center turn signals were back between the hoppers and not visible at all from the cab.

 

Ive never pulled a flatbed where they could be seen unless making a turn

 

They are not meant for the driver to see but for the other vehicles around the truck

 

pulled dry vans where they tucked under the bed a bit.

only at night could you tell they were working.

I liked the ones that bulged out and you could see them from the front or rear.

 

I've never heard of such a thing and one of my flats has them but I can't see them from the cab.

 

Footnote 4 is for rear side marker lights, doesn’t say anything about a mid trailer turn signal.

 

When our trucks go through inspections at the scales the drivers never get asked if they can see the middle blinker so my answer would be no.
As fussy as California is I'm sure we would have been cited for it by now if it was required.

 

If it’s OEM, don’t worry about it.