Flash floods are possible at any time. Some areas are particularly prone to them and you will see signposts, such as the one below, mounted on high poles. At the edge of a flood you will have standing water several…
How are road widths decided? Road widths are decided using: Vehicle type Volume (frequency) Speed Lane type required (e.g. is a turning bay required, or will long vehicles need to turn sharply and therefore need a larger swept path) Situation…
The police (and other emergency services) use sirens as a warning to let motorists know they are coming. Modern sirens oscillate (i.e. the pitch goes up and down), usually in a band that sits between 1-3kHz (this is the pitch…