Project manager: Now then Normal Bloke, we need more granularity here. Firstly, what road are you referring to? Next, is there any traffic on said road and if so, at what speed is it travelling? We also need to define the camber of the edges and the traction factor of the tarmac under the temperature of the day to ascertain the breaking distance of the road users in case of a Normal-Bloke-Old-Lady-slippage scenario. Next, we need...
Granular Synthesis is the method of dissecting sampled audio or generated sound waves into tiny segments of generally only fifty to few hundred milliseconds. These segments can then be manipulated further. Pitch, duration and delay of grains can usually be edited to attain effects such as a "grain cloud."
Granularsynthesis is used to make many reverberating, ambient sound-scapes used in film scoring.