Rules for drivers and motorcyclists 1.Vehicle condition  2.Fitness to drive  89. Vehicle condition.   You MUST   ensure your vehicle and trailer  comply with the full requirements of the Road Vehicles  (Construction and Use) Regulations and Road Vehicles Lighting  Regulations (see The road user and the law).  90. Make sure that you are fit to drive.   You MUST   report to the Driver  and Vehicle Licensing Agency (DVLA) any health condition likely to  affect your driving.  91. Driving when you are tired greatly increases your risk of collision.  To minimise this risk  ● make sure you are fit to drive. Do not begin a journey if you  are tired. Get a good night’s sleep before embarking on a  long journey  ● avoid undertaking long journeys between midnight and 6am,  when natural alertness is at a minimum  highwaycodeuk.co.uk 43  Law RTA 1988 sect 94 