Aero add-ons for box truck

[Snowman9000]

I took these photos a year or two ago at a gas station. The wedge above the cab is common, but the lower pieces are not. I wonder if it pays off for this fleet. They are diesel Sprinters.

Interesting, the protrusion lip on the over cab thing.

[Frank Lee]

That upper cab fairing isn't how I'd have done it but it might be better than nothing. Time to break out the table fan and incense.

[Erasmo]

Most modern lorries have them:



They're not even only skirts but also usable loading space.

[freebeard]

Interesting, the protrusion lip on the over cab thing.

Free sunvisor! It creates a secondary stagnation point that forces air off the windshield sideways. Possibly a shorter distance to travel which displaces the air less?

[aerohead]

I also think that the protrusion limits solar gain,may provide some visibility benefit in inclement weather,also,act as an upside-down splitter to divert the flow sideways,rather than have it all go over the roof.
'like what they've done.Some boat-tailing would really help on the highway.