20MPH Everywhere to Save Money on Road Signs?! You Couldn’t Make It Up!

A proposal discussed at Westminster suggests expanding blanket 20mph limits because it could save money on signs and administration. Sensible safety measure, or a triumph of bureaucracy over common sense?

Every now and then a story emerges from the corridors of Westminster that makes you stop, put down your tea, rub your eyes and double-check that you haven’t accidentally wandered onto a parody website. This was one of those moments. According to evidence submitted to the House of Commons Transport Committee by the Parliamentary Advisory Council for Transport Safety, better known as PACTS, one argument for introducing more blanket 20mph speed limits is that doing so could reduce the need for additional signs, consultations, traffic orders and all the associated administrative clutter that accompanies modern transport policy. In other words, if I’ve understood this correctly, one of the reasons millions of motorists could find themselves travelling more slowly is because road signs are apparently becoming a bit expensive.

Now before somebody accuses me of wanting to recreate Le Mans on Acacia Avenue, let’s establish something important from the outset. I am not anti-20mph. Outside schools it makes perfect sense. Outside hospitals it makes perfect sense. On busy shopping streets where pedestrians, cyclists, delivery riders, buses and bewildered motorists all mingle in a sort of urban ballet choreographed by chaos itself, it makes perfect sense. The issue isn’t 20mph limits. The issue is the increasingly fashionable belief that if something works in one place it must therefore work everywhere, as though roads are interchangeable and human behaviour can be managed by applying a single number to every situation.

Roads Are Not All The Same

Take Kingsbury High Road near where I live. It’s a vibrant, bustling, gloriously busy stretch of North West London lined with restaurants, cafés, sweet shops, supermarkets and enough culinary temptation to derail even the most disciplined diet. There are pedestrian crossings. There are designated crossing points. There are places specifically designed to allow people to cross safely. Yet on any given day you’ll see people crossing wherever they fancy because they’ve spotted a bargain over there, because the mangoes look fresher on the opposite side of the road, because the butcher has a special offer, or simply because walking an extra twenty yards feels like an outrageous infringement of their civil liberties.

That isn’t a criticism. It’s simply reality. Human beings are wonderfully irrational creatures. We respond to convenience, habit and opportunity, which is precisely why good road safety policy has always been about understanding human behaviour rather than pretending it doesn’t exist. Drivers are exactly the same. A narrow residential street lined with parked cars naturally encourages caution. A wide, open avenue naturally encourages progress. Good road design works with human psychology. Bad road design works against it.

The Statistic That Made Me Splutter My Tea

Then we arrive at the number that genuinely made me stop and stare.

Police forces across the United Kingdom issued 488,599 speeding tickets on 20mph roads during 2024. That’s nearly half a million offences in a single year and represents an increase of roughly two-thirds compared with the year before. Not over a decade. Not over five years. One year.

Speeding Enforcement on 20MPH Roads

At this point we have to ask ourselves a fairly obvious question. Has Britain suddenly become populated by an army of reckless speed demons incapable of obeying a 20mph sign, or do some of these roads perhaps not naturally feel like 20mph roads? Because half a million offences is an astonishing number. If every one of those drivers really represented a serious threat to public safety, our roads would resemble a live-action remake of Mad Max. The more likely explanation is that many motorists are finding themselves caught between what the road appears designed for and what the sign at the side of it demands.

Looking At The Dashboard Instead Of The Road

One of the unintended consequences of modern speed management is something I suspect many drivers will recognise immediately. Sometimes it feels as though I spend more time looking at the speedometer than I do looking at the road. I’m checking the dashboard. Checking for cameras. Checking whether I’ve drifted from nineteen to twenty-three miles per hour while climbing a hill. Checking average speed camera zones. Checking warning systems. Checking signs. Then checking more signs.

Meanwhile, out in the real world, there are pedestrians stepping into the road, cyclists filtering through traffic, buses pulling away from stops, motorcyclists appearing in mirrors and potholes opening up like portals to another dimension. Surely road safety should encourage drivers to focus on what is happening outside the car rather than constantly monitoring what is happening inside it.

To Be Fair, The Evidence Is Not All One-Sided

Now this is where the debate becomes genuinely interesting because the advocates of lower speed limits are not entirely wrong. There is evidence that lower speeds can reduce casualties, particularly in areas where vehicles and pedestrians interact closely. Studies from Edinburgh and Wales have reported reductions in collisions and casualties following the introduction of widespread 20mph limits, while Welsh Government data suggests that total casualties fell following the implementation of its default 20mph policy.

Reported Benefits of 20MPH Limits

That evidence deserves acknowledgement. The argument that lower speeds can reduce casualty severity is perfectly logical. A pedestrian struck at 20mph has a better chance of avoiding serious injury than one struck at 30mph. Nobody sensible disputes that.

If Slower Is Safer, Why Stop At Twenty?

But here’s where things start getting philosophically slippery.

If 20mph is safer than 30mph, then surely 10mph is safer than 20mph. And if 10mph is safer than 20mph, then 5mph is safer still. In fact, if we really want to eliminate risk altogether, perhaps the safest solution would be for nobody to go anywhere ever again. We could all stay at home wrapped in bubble wrap, consuming takeaway food and arguing with strangers on social media.

Except even that doesn’t work either. According to RoSPA, more than half of accidental deaths occur following accidents in the home.

Accidental Deaths by Location

The point isn’t to trivialise accidents. Quite the opposite. The point is that risk is part of life. We manage it. We mitigate it. We reduce it where sensible. What we don’t do is pretend it can be eliminated entirely because that way lies absurdity.

Cars Have Changed. Have The Rules Kept Up?

Another aspect that often gets overlooked is how dramatically vehicles themselves have improved. Modern cars are technological marvels compared with the machines many of us learned to drive in. Today’s family hatchback is equipped with more computing power and safety technology than some executive cars of twenty years ago.

We now have autonomous emergency braking, pedestrian detection, cyclist detection, lane-keeping assistance, blind spot monitoring, adaptive cruise control, driver monitoring systems and increasingly sophisticated collision avoidance technology. Modern tyres generate more grip. Modern brakes stop more effectively. Crash structures are vastly superior. Even the shape of the bonnet has been redesigned to reduce pedestrian injuries.

Yet much of the speed limit debate still feels rooted in assumptions formed decades ago when cars were objectively less capable, less intelligent and less forgiving.

Smarter Roads, Not Simply Slower Roads

Which brings me to what I believe is the real solution. The future should not be fewer signs. The future should be smarter signs.

Variable speed limits already work brilliantly on Britain’s motorways. Drivers generally accept them because they make sense. If the limit drops suddenly, most people assume there’s a reason. Congestion. An accident. Roadworks. Poor visibility. The road is responding to conditions in real time. Why shouldn’t more roads work the same way?

Imagine limits that change according to weather conditions, visibility, traffic density, school opening times or pedestrian activity. Twenty miles per hour outside a school at drop-off time. Thirty during normal daytime conditions. Forty late at night when visibility is excellent, the roads are empty and pedestrian activity is minimal.

Yes, it would cost more. Yes, it would require investment. But it would also be smarter, more targeted and ultimately more effective than simply replacing one number with another and hoping for the best.

Safety Matters. So Does Common Sense.

Road safety matters. Nobody wants more collisions, more injuries or more deaths. The evidence suggests lower speeds can save lives in the right environments and that should never be dismissed. At the same time, nearly half a million speeding tickets on 20mph roads in a single year suggest that something more complicated is happening than simple non-compliance.

Perhaps instead of asking how we can make every road slower, we should be asking how we can make every road smarter. Because safer roads and slower roads are not always the same thing, and if our transport policies are going to command public confidence rather than public frustration, they need to reflect the messy, complicated, imperfect reality of how people actually behave rather than how policymakers wish they behaved.

And that, surely, is a debate worth having.

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