The problem is, drivers who stick to - or hog - the middle lane encourage surrounding motorists to undertake them which then disturbs the momentum of traffic. Staying in the middle lane during heavy rain is a simple precaution that could make all the difference.”But, in other conditions, motorists who hog the middle lane could be faced with a hefty fine or points on their licence. According to a survey carried-out by National Highways, a whopping 32% of drivers admit to middle lane hogging at least "occasionally", 5% stated they "always" do it. What does the Highway Code say about driving in - or hogging - the middle lane? Don’t undertakeAs tempting as it might be, you risk prosecution for careless driving or driving without due care and attention if you undertake a middle lane hogger on the motorway.