The legal alcohol limit for drivers in England exists to reduce road accidents and fatalities caused by impaired driving. Alcohol significantly degrades the skills necessary for safe vehicle operation: it slows reaction times, impairs judgment, and reduces coordination.
By setting a maximum legal blood alcohol concentration (BAC), the law aims to keep drivers below the threshold where accident risk rises sharply. This protects not only the driver but also passengers, pedestrians, and other road users, promoting safer streets for everyone.