Flowers don't grow at the sides of roads, they just suddenly appear, Just like that bend when it flung itself at James Dean's car. There are, however, no flowers abloom for those who die in factories, offices, hospitals or brothels.
Though there is no logical explanation for those flowers that turn up at the side of the road, there is one thing true for them all: the flowers only appear on those roads inhabited by ghosts who lament: “I bid farewell to life on this road”.