This article discusses the timing of the cutting of road verges but I also wonder what parking on verges is doing to plant and insect biodiversity in suburban areas. The increase in the number of cars per household (see http://www.bbc.co.uk/news/uk-20681033) means more cars parked on the streets and I frequently notice patches of bare earth where there was once a grassy verge.
More than 700 species of wild plants - almost half of the native flora of the British Isles - are found on road verges, according to a study. Many plants once found in meadows now only thrive beside roads, where they provide essential habitat for insects, says charity Plantlife. But it says one in 10 of the plants is at risk of extinction, in part because councils cut verges too early.