I saw this broken down truck in the Mazowe valley this morning. The cans are there to warn approaching motorists that there is a hazard ahead. Now about a year ago we all had to purchase red triangles (x2) and a fire extinguisher to be carried in all vehicles at all times. Yet I still see branches and various other unique warning signs used for this purpose.
A Zimbabwean answer to the red warning triangle.
Zimbabwe Absurdity 
Hmm, was the truck driving on the right side of the road?
By the way, you have several requests in your About Me section – did you read/reply to them?