Most drivers know that speeding is dangerous, but driving too slowly can also put you and others at risk. In fact, research highlighted by the RAC suggests that driving significantly below the speed of surrounding traffic can be just as hazardous as speeding.

Here’s why slow driving causes problems, what the law says, and how to stay safe on the road.

How driving too slowly causes issues

Driving far below the normal flow of traffic can create unexpected hazards. Other road users may not anticipate such a slow pace, especially on faster roads like dual carriageways or motorways.

Risks of driving too slowly include:

  • Frustration and road rage – slow driving can irritate other drivers, leading to risky or aggressive behaviour.
  • Sudden braking – faster-moving vehicles may need to brake sharply, creating a ripple effect behind them
  • Increased collision risk, near misses, or accidents.
  • Lane disruption – larger vehicles, such as HGVs, may move into faster lanes to overtake, adding to congestion
  • Motorway lane misuse – staying in the middle lane unnecessarily can result in penalties, including fines and points on your license.

Middle‑lane hogging is a common example. If you remain in the middle lane when the left lane is clear, you could receive an on‑the‑spot £100 fine and three points on your licence. Despite this, 32% of drivers admitted to doing it regularly in a survey by Confused.com.

Why do people drive too slowly?

There are several reasons why someone might drive below the normal speed of traffic:

  • Lack of confidence or limited driving experience
  • Health issues, such as poor eyesight or slower reaction times
  • Anxiety about causing an accident
  • Distraction, including mobile phone use

If you see a driver using a phone behind the wheel, and it’s safe to do so, you can report it to the police.

How slow is too slow to drive

There is no fixed definition of “too slow” in UK law.

  • Most roads do not have a minimum speed limit.
  • Minimum limits only apply in specific areas (e.g. tunnels or bridges) and are shown by blue circular signs with white numbers.

However, that doesn’t mean driving very slowly is always acceptable.

Driving too slowly can be classed as careless or inconsiderate driving if it puts others at risk.

Ultimately, while speed limits are maximums, and not targets, they are still a useful guide regarding the expected minimum speed.

Driving far below the limit without a good reason can create danger and keeping reasonably close to the flow of traffic helps maintain safety

At the same time, always adjust your speed for:

  • Weather conditions.
  • Traffic.
  • Road layout.

Modern sat navs can also display the current speed limit to help you stay aware.

Stay safe and informed on the road

Driving too slowly can be just as risky as driving too fast. Keeping a steady pace that matches the flow of traffic, while adjusting for conditions, helps keep everyone safe.

If you want more driving advice, check out our blog on Obscure Driving Laws.

And if you’re looking for sat navs that display speed limits and safety alerts, explore our full range at Halfords.

2 comments

  2. I’ve said it for years that idiots driving too slow are just as dangerous as idiots driving too fast.

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