6.Overtaking 267. Do not overtake unless you are sure it is safe and legal to do so.  Overtake only on the right. You should  ● check your mirrors  ● take time to judge the speeds correctly  ● make sure that the lane you will be joining is sufficiently  clear ahead and behind  ● take a quick sideways glance into the blind spot area to  verify the position of a vehicle that may have disappeared  from your view in the mirror  ● remember that traffic may be coming up behind you very  quickly. Check all your mirrors carefully. Look out for  motorcyclists. When it is safe to do so, signal in plenty of time, then move out  ● ensure you do not cut in on the vehicle you have overtaken  ● be especially careful at night and in poor visibility when it is  harder to judge speed and distance.  268. Do not overtake on the left or move to a lane on your left to  overtake. In congested conditions, where adjacent lanes of traffic  are moving at similar speeds, traffic in left-hand lanes may  sometimes be moving faster than traffic to the right. In these  conditions you may keep up with the traffic in your lane even if this  means passing traffic in the lane to your right. Do not weave in and  out of lanes to overtake.  269. Hard shoulder.   You MUST NOT   use the hard shoulder for  overtaking. In areas where an Active Traffic Management (ATM)  Scheme is in force, the hard shoulder may be used as a running  highwaycodeuk.co.uk 137 