Why You Should Not Trust Your Car’s Automatic Systems Completely

12 February 2026

Paul Francis

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Most modern drivers assume that if a feature is labelled “automatic”, it will take care of itself. Automatic lights. Automatic braking. Automatic lane correction. The car feels intelligent, almost watchful.

Car dashboard at night with blurred city lights in the background. Speedometer glows blue. Display shows 8:39. Moody, urban setting.

But there is a quiet issue that many drivers are unaware of, and it begins with something as simple as headlights.

The automatic headlight problem

In fog, heavy rain or dull grey daylight, many cars will show illuminated front lights but leave the rear of the vehicle dark. From inside the car, everything appears normal. The dashboard is lit. The automatic light symbol is active. You can see light reflecting ahead.

However, what often happens is that the vehicle is running on daytime running lights rather than full dipped headlights. On many cars, daytime running lights only operate at the front. The rear lights remain off unless the dipped headlights are manually switched on.

The system relies on a light sensor that measures brightness, not visibility. Fog does not always make the environment dark enough to trigger full headlights. Heavy motorway spray can reduce visibility dramatically while still registering as daylight. The result is a vehicle that is difficult to see from behind, especially at speed.

Under the Highway Code, drivers must use headlights when visibility is seriously reduced. Automatic systems do not override that responsibility. In poor weather, manual control is often the safer choice. It is a small action that can make a significant difference.

Automatic emergency braking is not foolproof

Automatic Emergency Braking, often referred to as AEB, is one of the most widely praised safety technologies in modern vehicles. It is designed to detect obstacles and apply the brakes if a collision appears imminent.

In controlled testing, it reduces certain types of crashes. But it is not infallible. Cameras and radar can struggle in heavy rain, low sun glare, fog, or when sensors are obstructed by dirt or ice. Some systems have difficulty detecting stationary vehicles at high speed. Others may not recognise pedestrians at certain angles.

It is a safety net, not a guarantee.

Lane assist is not autopilot

Lane keeping systems gently steer the car back into its lane if it detects a drift. On clear motorways with bright road markings, they can work well.

On rural roads, in roadworks, or where markings are faded, they can disengage or behave unpredictably. Drivers may not even realise when the system has switched off. Over time, there is a risk that drivers become less attentive, assuming the vehicle will correct mistakes.

It will not.

Cars drive on a wet highway during sunset. The sky is golden, and trees line the road. The scene is viewed through a windshield.

Adaptive cruise control still requires full attention

Adaptive cruise control maintains speed and distance from the car ahead. It is comfortable on long motorway journeys.

However, it does not anticipate hazards like a human driver. It can brake sharply when another vehicle exits your lane. It may not react appropriately to a fast vehicle cutting in. Most importantly, it does not read the wider context of traffic conditions.

It reduces workload, but it does not remove responsibility.

Blind spot monitoring is not perfect

Blind spot indicators are helpful, especially in heavy traffic. They provide an extra warning when another vehicle is alongside you.

But motorcycles, fast approaching cars, or vehicles at unusual angles can sometimes escape detection. Sensors can also be affected by weather or dirt. A physical shoulder check remains essential.

Cameras distort reality

Reversing cameras and parking sensors have reduced low-speed bumps and scrapes. They are undeniably useful.

Yet cameras distort depth perception, and small or low obstacles can be difficult to judge accurately. Relying entirely on the screen rather than physically checking surroundings is one of the most common causes of minor accidents.

The bigger risk is complacency

There is a growing concern among safety researchers about automation complacency. When systems work well most of the time, drivers begin to relax. Attention drifts. Reaction times lengthen.

Modern vehicles are safer than ever, but the technology is designed to support an attentive driver. It is not designed to replace one.

The word “assist” appears frequently in the naming of these systems for a reason. They assist. They do not assume control.

Automatic lights, braking, steering correction and cruise systems are impressive pieces of engineering. They reduce risk. They improve comfort. But they still require a human driver who understands their limits.

Trusting technology is reasonable. Trusting it completely is not.

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Should we be more resilient to extreme heat?

Gregory Devine
May 20, 2024
3 min read

As top temperatures in the UK have now reached 40 Celsius, some people are calling for new legislation regarding working in extreme heat.

Water bottle with a temp gauge on the side.

‘I like it hot, but I don’t like it this hot’ will be a phrase we will no doubt hear multiple times this summer, with the ridiculous temperatures the UK is now forced to deal with—but at what point does the weather become too much? Business owners were asking themselves that question as they made the decision on whether they and their teams should work at home, or not, during last week’s record-breaking heatwave.

No doubt some people will say it’s only hot weather, but I’m inclined to disagree with this. This isn’t just hot weather; we are actually living through a national emergency. The temperature doesn’t just directly affect us as people— hot weather threatens the infrastructure that helps us get to work. Train tracks can buckle due to the heat, which will affect people’s commute. Last week, crews were on standby to lay sand down in some parts of the country where there were concerns the road could melt away.

On Tuesday 19 July 2022 most of the east coast mainline was closed, which meant there were no trains from York to London. Many people, therefore, couldn’t get to work on Tuesday or attend meetings and events in London. Government guidance is desperately needed. There needs to be a framework, guidelines…something for business owners, and even headteachers, to refer to, so that they can effectively make a decision on whether it’s safe for employees or students to come into work/school. Such legislation on extreme temperatures, at the rate we’re going, will be something used quite often, as the UK will see more 40+ Celsius temperatures, due to climate change.

At what point should employees not come into work? At what point is it not safe to send a child into school? There is no definitive answer for this nor is there, currently, any real guidance to help.

Do we all need to suck it up and just get on with it? Dominic Raab, the Deputy Prime Minister, would agree with this. He said, ‘We ought to enjoy the sunshine, and actually, we ought to be resilient enough through some of the pressures it will place.’ Seems somewhat irresponsible of him to say that when you consider the national warnings that were given out. Some business owners are suggesting it’s better for employees to come into the workplace, because they’re more likely to be air-conditioned. I would agree with this if most people could actually get to work, but many won’t, due to public transport being cancelled—thanks to buckled train lines and melting roads.

I recently spoke about how the UK simply isn’t built for temperatures this hot, with the humidity and the fact our infrastructure is built to be more resilient against colder weather. We don’t have the means to effectively deal with extreme heat. 40+ Celsius is currently rare, but temperatures of 30+ Celsius are now an annual occurrence. Despite this, our buildings are still designed to be great at keeping warmth in, not keeping cool, which only makes matters worse during a heatwave. This isn’t a complaint, more a fact of life. We can’t get rid of the insulation, as we also experience cold winters.

We need appropriate legislation and guidance to refer to—so that business owners can make an effective decision that’s best for the needs of their company in a heatwave. In my opinion, it should be a case of ‘if you can get to work in a safe manner that isn’t putting anyone at risk’ then you should do so. The point on offices being airconditioned is a good one; it would certainly be more comfortable being at work than at home during periods of extreme heat. That being said, if you can’t get to work because trains are cancelled, for example, then it should also be acceptable to work from home.