The second impact, also known as second collision and human collision, is the impact suffered between a vehicle occupant and the vehicle during a collision. The first impact is the impact between the vehicle and another object. [1] There is also a third impact between the internal organs and the frame of the body.
The term was coined in the 1950s by Sergeant Elmer Paul of the Indiana State Police. Paul convinced Indiana authorities to investigate the mechanics of highway injuries, and worked with safety pioneer Hugh DeHaven. [2]
The effects of the second impact are reduced by the use of seat belts, airbags, interior vehicle padding and removing of aggressive structures. [3]
A seat belt, also known as a safety belt or spelled seatbelt, is a vehicle safety device designed to secure the driver or a passenger of a vehicle against harmful movement that may result during a collision or a sudden stop. A seat belt reduces the likelihood of death or serious injury in a traffic collision by reducing the force of secondary impacts with interior strike hazards, by keeping occupants positioned correctly for maximum effectiveness of the airbag, and by preventing occupants being ejected from the vehicle in a crash or if the vehicle rolls over.
An airbag is a vehicle occupant-restraint system using a bag designed to inflate in milliseconds during a collision and then deflate afterwards. It consists of an airbag cushion, a flexible fabric bag, an inflation module, and an impact sensor. The purpose of the airbag is to provide a vehicle occupant with soft cushioning and restraint during a collision. It can reduce injuries between the flailing occupant and the vehicle's interior.
Crumple zones, crush zones, or crash zones are a structural safety feature used in vehicles, mainly in automobiles, to increase the time over which a change in velocity occurs from the impact during a collision by a controlled deformation; in recent years, it is also incorporated into trains and railcars.
Automotive safety is the study and practice of automotive design, construction, equipment and regulation to minimize the occurrence and consequences of traffic collisions involving motor vehicles. Road traffic safety more broadly includes roadway design.
Road traffic safety refers to the methods and measures used to prevent road users from being killed or seriously injured. Typical road users include pedestrians, cyclists, motorists, vehicle passengers, and passengers of on-road public transport.
A bumper is a structure attached to or integrated with the front and rear ends of a motor vehicle, to absorb impact in a minor collision, ideally minimizing repair costs. Stiff metal bumpers appeared on automobiles as early as 1904 that had a mainly ornamental function. Numerous developments, improvements in materials and technologies, as well as greater focus on functionality for protecting vehicle components and improving safety have changed bumpers over the years. Bumpers ideally minimize height mismatches between vehicles and protect pedestrians from injury. Regulatory measures have been enacted to reduce vehicle repair costs and, more recently, impact on pedestrians.
LS-DYNA is an advanced general-purpose multiphysics simulation software package developed by the former Livermore Software Technology Corporation (LSTC), which was acquired by Ansys in 2019. While the package continues to contain more and more possibilities for the calculation of many complex, real world problems, its origins and core-competency lie in highly nonlinear transient dynamic finite element analysis (FEA) using explicit time integration. LS-DYNA is used by the automobile, aerospace, construction and civil engineering, military, manufacturing, and bioengineering industries.
Seat belt legislation requires the fitting of seat belts to motor vehicles and the wearing of seat belts by motor vehicle occupants to be mandatory. Laws requiring the fitting of seat belts to cars have in some cases been followed by laws mandating their use, with the effect that thousands of deaths on the road have been prevented. Different laws apply in different countries to the wearing of seat belts.
A side collision is a vehicle crash where the side of one or more vehicles is impacted. These crashes typically occur at intersections, in parking lots, and when two vehicles pass on a multi-lane roadway.
The pillars on a car with permanent roof body style are the vertical or nearly vertical supports of its window area or greenhouse—designated respectively as the A, B, C and D-pillar, moving from front to rear, in profile view.
In May 2013, the World Health Organization (WHO) reported that more than 270,000 pedestrians lose their lives on the world’s roads each year, accounting for 22% of the total 1.24 million road traffic deaths. Despite the magnitude of the problem, most attempts at reducing pedestrian deaths had historically focused solely on education and traffic regulation. Since the 1970s, crash engineers have begun to use design principles that have proved successful in protecting car occupants to develop vehicle design concepts that reduce the likelihood of injuries to pedestrians in the event of a car-pedestrian crash, or reduce the likelihood of a car-pedestrian crash in the first place.
A crash simulation is a virtual recreation of a destructive crash test of a car or a highway guard rail system using a computer simulation in order to examine the level of safety of the car and its occupants. Crash simulations are used by automakers during computer-aided engineering (CAE) analysis for crashworthiness in the computer-aided design (CAD) process of modelling new cars. During a crash simulation, the kinetic energy, or energy of motion, that a vehicle has before the impact is transformed into deformation energy, mostly by plastic deformation (plasticity) of the car body material, at the end of the impact.
AmSafe Inc. is a manufacturer of air safety and securement products to the aerospace, defense, and ground transportation industries and maker of aircraft seatbelts. AmSafe makes the Aviation Inflatable Restraint (AAIR), a seatbelt airbag approved by the FAA designed to improve occupant protection from serious head injury during an otherwise unsurvivable aircraft accident. The airbag allows manufacturers and airlines to meet the FAA 16g seat retrofit rule that mandates all aircraft comply by October 2009 (1).
A traffic collision, also known as a motor vehicle collision, or car crash, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other moving or stationary obstruction, such as a tree, pole or building. Traffic collisions often result in injury, disability, death, and property damage as well as financial costs to both society and the individuals involved. Road transport is statistically the most dangerous situation people deal with on a daily basis, but casualty figures from such incidents attract less media attention than other, less frequent types of tragedy. The commonly used term car accident is increasingly falling out of favor with many government departments and organizations, with the Associated Press style guide recommending caution before using the term. Some collisions are intentional vehicle-ramming attacks, staged crashes, vehicular homicide or vehicular suicide.
Takata Corporation was a Japanese automotive parts company. The company had production facilities on four continents, with its European headquarters located in Germany. In 2013, a series of deaths and injuries associated with defective Takata airbag inflators made in their Mexico plant led to a recall of 3.6 million cars equipped with Takata airbags. Further fatalities caused by the airbags have led the National Highway Traffic Safety Administration (NHTSA) to order an ongoing, US-wide recall of more than 42 million cars, the largest automotive recall in U.S. history. In June 2017, Takata filed for bankruptcy. It was acquired by Key Safety Systems. As of January 2024, over 100 million airbag inflators worldwide have been recalled by more than 20 carmakers.
The Latin New Car Assessment Programme is an automobile safety assessment programme for Latin America and the Caribbean. Founded in 2010, it offers independent information to consumers about the safety levels of new cars in the market. Latin NCAP tests are based in international renowned methodologies, with vehicles awarded a safety rating between 0 and 5 stars, indicating the protection the cars offer to adult and child occupants. The programme started as a joint initiative and in 2014 it was established as an association under a legal entity framework.
The Volkswagen Virtus is a subcompact sedan (B-segment) manufactured by the German automaker Volkswagen since 2018. It is based on the Polo Mk6 with an extended wheelbase and the same Volkswagen Group MQB A0 platform, which it also closely shares with the Taigo/Nivus and T-Cross/Taigun.
GlobalNew Car Assessment Programme is a project of the Towards Zero Foundation, a UK-registered charity. The programme serves as an umbrella organisation encouraging co-operation between the various New Car Assessment Programmes around the world, and supports campaigns to inform consumers about the safety of vehicles in markets that are weakly regulated or do not yet have their own consumer safety programmes.
The Tata Punch is a crossover city car (A-segment) manufactured by Tata Motors Cars since 2021. Positioned as the smallest SUV of the brand below the Nexon, the Punch is built on ALFA-ARC platform shared with the Altroz hatchback.
The Škoda Slavia is a subcompact sedan (B-segment) manufactured by Škoda primarily for the Indian market. It was introduced in November 2021 and has been produced since 2022. Built on the MQB A0 IN platform adapted for India, the vehicle is based on the Volkswagen Virtus sedan. The Slavia replaced the Volkswagen Polo-based Rapid.