This Practice Note explains the offence of careless or inconsiderate driving under section 3 of the Road Traffic Act 1988 (RTA 1988). It deals with the elements of the offence of careless driving, the meaning of ‘drive’, ‘mechanically propelled vehicle’, ‘road or other public place’, ‘without due care and attention or inconsiderate driving’. It also covers examples of driving likely to be considered careless, defences to careless driving including automatism, mechanical defect, duress, careless driving as an alternative verdict and sentencing for careless driving. This Practice Note also explains the offence of causing serious injury by careless or inconsiderate driving contrary to RTA 1988, s 2C and includes links to the applicable sentencing guidelines and information on available Fixed Penalty Notices which can be imposed as an alternative to prosecution.