This is the norm not the exception in India. Trucks, or goods carriers, are all painted in a riot of colours. I’m sure that someone has to have done a photo essay of these trucks. It’s really seems to be a statement of personal identity of the truck drivers.
The other brilliant aspect of the trucks is that almost every one of them have a brightly pained Horn OK Please message on the back. I think it actually should read as Horn Please OK, but the OK is usually in the between Horn Please. We asked our Indian hosts about this phrase. It’s origin has passed into the mists of time. Our hosts didn’t remember who started it.