We all hear it time and time again about some, and I say only some caravan or motorhome people that they discharge grey or black water whilst travelling along the highway. That's nothing compared to trucks in particular 2 decks on a B-double with cattle.
On a return visit today from the south coast we got stuck behind one for approx 50 klms plus.
Every corner, every hill he crested and any movement from side to side was a continuous spray of liquid crap flowing out everywhere.
Spraying all over the road and onto cars either behind or coming towards him.
Wasn't going to take a chance of having a sh*# shower if I tried to pass him.
You get people whinging about caravans etc but a sh#* shower is worse from a truck.
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Age does not weary us, makes us go travelling more
Ive been in similar situations with trucks leaking liquids that I had no idea what they were.
I find the best solution is to just pull over for a short while and avoid it altogether.
And relax.
It's a good idea to keep well back from stock trucks. As unpleasant as it is, most stock poop is grasses/grains etc which is nowhere near as bad as carnivore poop.
We went to the coast last week and I had to warn my daughter not to go too close to a lookout area because a grot had left used loo paper around, so there was probably a poop somewhere nearby.