Crash tests with dummies: everything about checking car safety

When you choose a new car, one of the key criteria is its safety. But how exactly is it determined how much a car will protect passengers in an accident? The answer lies in crash tests with dummies — complex tests that simulate real accidents. These tests not only help manufacturers improve body design and passive safety systems, but also directly influence the vehicle's rating in independent organizations such as Euro NCAP or IIHS.

The dummies used in crash tests are not simple dolls, but high-tech devices equipped with dozens of sensors. They record the overloads that the human body experiences during an impact: from the force on the chest to the pressure on the hip bones. Data from these sensors is analyzed by engineers to assess the risk of injury to the driver, passengers and even pedestrians. But how exactly are such tests carried out, what types of crash tests exist and why are the results sometimes controversial? Let's sort it out in order.

What is a crash test and why is it needed?

Crash test (from English. crash test - "destruction test") is a controlled experiment in which a car collides with an obstacle at a certain speed in order to evaluate it passive safety. The main goal of such tests is to understand how the car will behave in an accident and how well it will protect the people inside.

The first crash tests appeared back in the 1930s, but then they were primitive: cars were simply dropped from a height or collided with stationary objects. Modern testing follows strict protocols that take into account different crash scenarios: frontal impact, side impact, rollover and even pedestrian collision. The results of these tests are published publicly, allowing buyers to compare models based on their level of safety.

• 🔧 For manufacturers: Crash test data helps improve body structure, airbags and seat belts.
• 📊 For insurance companies: the results affect the cost of the OSAGO/CASCO policy.
• 👨‍👩‍👧‍👦 For buyers: Safety rating often becomes a decisive factor when choosing a car.

It is important to understand that crash tests do not guarantee 100% protection in a real crash, but they do significantly reduce the risk of serious injury. For example, according to Euro NCAP, cars with a five-star rating reduce the likelihood of passenger deaths by 40–50% compared to models without certification.

Types of mannequins: from “Hybrid III” to “Thor-50”

Crash test dummies are not just imitation of the human body, but complex engineering structures that replicate human anatomy down to the millimeter. They are equipped with sensors that measure:

• 💥 Acceleration (how much G overloads the body upon impact).
• 🦴 Bone deformation (risk of fractures of ribs, femur).
• 🧠 Load on the head and neck (possibility of brain injury or whiplash).
• 🩳 Pressure on internal organs (for example, from a seat belt).

The most famous mannequin models:

• 🤖 Hybrid III - “gold standard” for frontal crash tests, weighs 78 kg (a man of average build).
• 👩 Hybrid III 5th Percentile Female - female version weighing 50 kg, used to assess passenger safety.
• 👶 CRABI and Q-dummies — children's dummies for testing seats and rear seats.
• 🧓 THOR-50M - the latest model with improved biomechanics of the shoulders and chest.

Interestingly, the cost of one mannequin can reach 200–500 thousand dollars - that is why they are used repeatedly, carefully restored after each test. For example, Hybrid III able to withstand up to 10–15 crash tests with proper maintenance.

Why aren't mannequins perfect?

Despite their high accuracy, mannequins cannot fully reproduce all the nuances of the human body. For example, they do not take into account differences in muscle mass, age-related differences (bone fragility in older people) or individual injuries. In addition, the sensors only record physical stress, but not the psychological consequences of the accident (for example, stress or shock).

How does a crash test work: step-by-step process

Carrying out a crash test is a complex, multi-step procedure that requires precise preparation. Let's see how this happens using an example head-on collision according to the protocol Euro NCAP:

1. Preparing the car: the car is fixed on a special trolley, mannequins are installed in the cabin (usually the driver + front passenger). Doors and windows are closed, seat belts are fastened.
2. Equipment setup: High-speed cameras (up to 1000 frames per second) are installed at different angles, sensors are calibrated.
3. Running the test: The vehicle accelerates to a predetermined speed (e.g. 64 km/h for a frontal impact) and collides with a deformable barrier.
4. Data collection: sensors on mannequins and the car transmit information to the computer, cameras record body deformation.
5. Analysis of results: Engineers evaluate the risk of injury for each body part and assign a score on a scale Euro NCAP.

One of the key points is collision speed. For example:

• 🚗 56 km/h - standard for frontal crash test IIHS (USA).
• 🚗 64 km/h — speed for test Euro NCAP (Europe).
• 🚗 50 km/h — side impact (imitation of a collision at an intersection).

Is the driver's footwell intact|

Did the airbags deploy (frontal, side, curtain)|

Condition of doors (can they open after impact)|

Deformation of the steering column (risk of chest injury)|

Integrity of the fuel system (are there any leaks) -->

Important: crash test results do not always coincide with real accidents. In real life, collisions occur at different angles, at different speeds, and involve multiple vehicles. However, standardized tests allow models to be compared with each other using common criteria.

Main types of crash tests and their features

There are several types of crash tests, each of which simulates a specific accident scenario. Let's look at the most common ones:

Test type	Speed	What is being checked	Example of an organization
Frontal impact (head-on collision)	56–64 km/h	Body deformation, airbag operation, load on legs and chest	Euro NCAP, IIHS
Side kick (T-bone)	50–55 km/h	Pole/other car penetration protection, side airbags	IIHS (moving barrier test)
Hit from behind (whiplash)	16–32 km/h	Risk of whiplash injury, operation of head restraints	Euro NCAP
Rollover	48–64 km/h	Roof strength, seat belts, curtain airbags	NHTSA (USA)
Colliding with a pedestrian	40 km/h	Pedestrian head and leg injuries, active hood operation	Euro NCAP (since 2018)

One of the most stringent tests - small offset front impact (Small Overlap Frontal), which conducts IIHS. In it, a car collides with a barrier at a speed of 64 km/h, covering only 25% of the width of the body. This test simulates a collision with a tree or pole and often reveals weak points in the structure.

⚠️ Attention: Some budget cars (especially older generations) may perform poorly in the test Small Overlap, even if they handled the classic frontal blow well. For example, Datsun on-DO (2014) received a 0 in this test due to severe deformation of the passenger compartment.

How to interpret crash test results: Euro NCAP rating

The most famous car safety rating system is Euro NCAP (European New Car Assessment Program). It assigns cars a rating from 0 to 5 stars based on four criteria:

1. Adult Occupant Protection (maximum 38 points).
2. Child protection (maximum 49 points).
3. Pedestrian protection (maximum 42 points).
4. Active safety systems (maximum 13 points).

To get 5 stars, the car must:

• 🌟 Dial at least 80% in the adult protection category.
• 👶 Dial at least 75% in the child protection category.
• 🚶 Dial at least 60% in the pedestrian protection category.
• 🤖 Have at least ESP (stability control system) and AEB (automatic emergency braking).

Example: Volvo XC90 (2023) received 5 stars with the results:

• Adult passengers: 97%.
• Children: 87%.
• Pedestrians: 76%.
• Active safety: 98%.

Important: rating Euro NCAP Valid only for a specific vehicle configuration. If the car was tested with side airbags and ESP, and you buy the basic version without these options, the level of security will be lower.

Controversial issues: why crash tests are sometimes criticized

Despite their obvious benefits, crash tests are not without their drawbacks. Here are the main complaints against them:

• 🎭 Artificial conditions: Real accidents rarely have perfect frontal or side impacts at right angles. More often, accidents occur at oblique angles or with rotation.
• 👴 Age of passengers not taken into account: The mannequins are representative of the average adult (30-50 years old) but do not simulate the fragility of the bones of the elderly or children.
• 🚗 Difference in vehicle weight: A 1 ton passenger car and a 2.5 ton SUV will suffer different injuries in a collision, but tests don't always take this into account.
• 💰 Manufacturers' influence: Some brands optimize machines specifically for testing, but do not improve actual safety.

A striking example of criticism is tests IIHS for small offset stroke. Many cars (including some models Toyota and Honda) showed poor results, although in real accidents the injuries were less serious. This has led to manufacturers starting to strengthen exactly the part of the body that is being tested in the test, sometimes to the detriment of other areas.

⚠️ Attention: If the car has received a high rating in Euro NCAP, but at the same time has weak side structures (as can be seen from the deformation of the doors in tests), it is worth additionally checking reviews of real accidents involving this model.

One more nuance: crash tests do not take into account secondary factors, such as:

• Fire after an accident (the integrity of the fuel system is checked, but the fire is not simulated).
• Flooding of the interior (if the car fell into a pond).
• Behavior of the electronics (e.g. will it work? eCall after a strong blow).

How crash test results affect the cost of a car and insurance

The safety rating is directly related to the price of the car and the cost of maintaining it. Here's how it works:

• 💵 Cost of a new car: highly rated cars Euro NCAP (4–5 stars) are usually 5–15% more expensive than non-certified analogues. For example, Volvo S60 with security package City Safety costs ~300,000 rubles more than the basic version.
• 📉 Insurance (MTPL/CASCO): Insurance companies reduce rates for cars with good crash test scores. The difference can reach 10–20% in the annual bonus.
• 🔄 Resale: Used cars with high safety ratings depreciate in value more slowly. For example, Skoda Octavia 2018 with 5 stars Euro NCAP on the secondary market it costs 8–12% more than a similar one Kia Ceed with 4 stars.

Case Study: After Lada Vesta in 2018 received 0 stars in the test ARCAP (Russian equivalent Euro NCAP), its sales fell 12% in the quarter. In response AvtoVAZ finalized the design, and the updated version in 2020 already received 3 stars, which helped restore demand.

FAQ: Frequently asked questions about crash tests with dummies

🔍 Why don’t they use real people in crash tests?

The use of living people in crash tests is prohibited for ethical and legal reasons. Even at low speeds (20–30 km/h) the risk of injury is extremely high. Mannequins allow you to repeat tests many times and record data that cannot be obtained with a living person (for example, the load on internal organs). In addition, most countries classify such experiments as intentional harm to health.

🚗 Can you trust crash tests from manufacturers (for example, videos from Mercedes or Toyota)?

Tests conducted by automakers themselves are often optimized to demonstrate a model's strengths. They can use:

• Lower collision speeds.
• Simplified barriers (for example, without deformable elements).
• Mannequins without some sensors.

For an objective assessment, it is better to focus on independent tests (Euro NCAP, IIHS, ARCAP).

🛠️ Why do some cheap cars show good results in crash tests?

Some budget models (for example, Dacia Sandero or Suzuki Swift) get 4–5 stars thanks to:

• Use of modern materials (high-strength steel in key areas).
• Optimization of the design for specific tests (for example, reinforced side members for frontal impact).
• Availability of basic active safety systems (ESP, ABS, pillows).

However, in real accidents such cars may behave worse due to their lower weight and less rigid body structure.

📈 How often are crash test reports updated?

Protocols Euro NCAP and IIHS updated every 2–3 years to take into account:

• New technologies (for example, tests for autopilot systems from 2020).
• Changes in car design (increasing the share of electric cars).
• Current accident statistics (for example, the increase in accidents involving pedestrians).

Latest major update Euro NCAP occurred in 2023 - the tests now include an assessment of crash protection against trucks and motorcycles.

🔋 Do crash tests affect the safety of electric vehicles?

Yes, additional requirements apply for electric cars:

• Check the integrity of the battery (risk of fire if deformed).
• Tests for current leakage after an accident.
• Evaluation of emergency shutdown systems for high-voltage circuits.

For example, Tesla Model Y received 5 stars in Euro NCAP in 2022, and battery protection was especially noted - after tests, no current leakage was recorded.