Most drivers dread nothing more than getting stuck behind one.
But if these service trucks are anything to go by, motorists who avoid them are missing out on a good laugh.
From devilishly rude ads for ploughing and plumbing to slogans that were simply ill-advised, these bumper signs and stickers are sure to tickle all those who catch a glimpse of them on the open road.
![A bold statement: These Floridian iron workers were seemingly unmoved by the idea of a family friendly slogan.](https://www.nzherald.co.nz/resizer/v2/ORXOB7QWAZBQ3DXPQ2CBK67C7M.jpg?auth=24ad29964a5ae0c4d64b6af0129e008017f866f835173d64dd32f7c622b2bd4b&width=16&height=10&quality=70&smart=true)
![Dirty work: This fluorescent septic tank service company is willing to go to murky depths.](https://www.nzherald.co.nz/resizer/v2/DVWVRVUFBZYSW2AABWJO6UUVU4.jpg?auth=092b5e70bcbf921337c27051031088ec1d96788f345cca13e9e1e68fca6fefb4&width=16&height=12&quality=70&smart=true)