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UVC

UVC is a three-letter acronym with several meanings. == Physical sciences == == Information technology == == Other uses == No rewrite necessary for detailed content on Ultraviolet C, as it should be placed in the "Ultraviolet C" subsection under Physical Sciences.

Physical Sciences

Ultraviolet C

Ultraviolet C (UVC) refers to a segment of the ultraviolet spectrum consisting of electromagnetic radiation with wavelengths ranging from 100 to 280 nanometers (nm), representing the shortest wavelengths in the UV band.^[1] This range positions UVC as the most energetic portion of ultraviolet light, with photons possessing sufficient energy to ionize molecules and induce chemical reactions. Unlike longer-wavelength UVA and UVB, UVC is almost entirely absorbed by the Earth's ozone layer and atmosphere, preventing significant terrestrial exposure from solar sources.^[2] Key properties of UVC include its high photon energy, which enables strong interactions with biological materials, particularly through absorption by nucleic acids. UVC radiation exerts germicidal effects by damaging the DNA and RNA of microorganisms, primarily via the formation of pyrimidine dimers that disrupt replication and transcription processes, leading to inactivation.^[3] The band is often subdivided into far-UVC (200–230 nm), which has limited penetration depth in biological tissues (absorbed primarily by outer dead skin cells) and moderate transmission in air, and conventional UVC (230–280 nm), which is more commonly used for surface and fluid treatments due to effective germicidal action.^[4] The energy E of a UVC photon is given by the equation

E = \frac{hc}{\lambda}

where h is Planck's constant ($6.626 \times 10^{-34} J·s), c is the speed of light ($3.00 \times 10^8 m/s), and \lambda is the wavelength in meters; for example, at 254 nm, this yields approximately 4.9 eV per photon.^[5] The identification of UVC emerged in the early 20th century through advancements in spectroscopy, building on Johann Wilhelm Ritter's 1801 discovery of ultraviolet light beyond the violet end of the visible spectrum. Systematic classification of UV bands, including UVC, followed from spectroscopic studies in the 1910s and 1920s that resolved short-wavelength emissions. The first documented germicidal application of UVC-like radiation occurred around 1903, when Danish physician Niels Ryberg Finsen employed concentrated ultraviolet light from carbon arc lamps to treat lupus vulgaris, a form of cutaneous tuberculosis, earning him the Nobel Prize in Physiology or Medicine in 1903 for pioneering phototherapy.^[6] Common artificial sources of UVC include low-pressure mercury vapor lamps, which emit predominantly at 254 nm through the excitation of mercury atoms, and excimer lamps, which generate monochromatic output (e.g., 222 nm from krypton-chlorine mixtures) via dimer formation in rare gas halides, offering mercury-free alternatives with tunable wavelengths.^[7] These sources are engineered for controlled emission, as natural UVC from the sun does not reach the surface. UVC finds primary applications in disinfection and purification, leveraging its antimicrobial properties to treat water, air, and surfaces by inactivating bacteria, viruses, and other pathogens. In water treatment, UVC systems integrated into flow-through reactors achieve log reductions in microbial load without chemical residues, while in air purification, upper-room or in-duct lamps reduce airborne contaminants in HVAC systems. Surface disinfection has gained prominence since the 2020 COVID-19 pandemic, with studies demonstrating UVC's efficacy in viral inactivation; for instance, exposure to 254 nm UVC at doses of 3–10 mJ/cm² can reduce SARS-CoV-2 titers by over 99.9% on non-porous materials within seconds to minutes.^[8]^[9]

Far Ultraviolet Camera/Spectrograph

The Far Ultraviolet Camera/Spectrograph (FUVE), also known as experiment S-201, is a dual-mode scientific instrument designed for imaging and spectroscopic observations in the far-ultraviolet wavelength range of approximately 100-200 nm, which falls within the broader ultraviolet C (UV-C) spectrum. Developed by Dr. George Carruthers at the Naval Research Laboratory (NRL) under NASA sponsorship, it utilized electronographic amplification to capture high-sensitivity images and spectra on nuclear emulsion film, enabling detection of faint emissions invisible to the human eye or conventional optics.^[10]^[11]^[12] Historically, the instrument was deployed on the lunar surface during the Apollo 16 mission in April 1972, marking the first astronomical observatory operated from the Moon. Astronauts John W. Young and Charles M. Duke positioned the gold-plated device on a tripod in the shadow of the lunar module at the Descartes highland site to protect it from direct sunlight, and it was remotely commanded from Earth over three days of operation. Weighing approximately 22 kg and measuring 49.5 × 78.7 × 53.3 cm, the F/1 3-inch Schmidt camera system included a film transport mechanism for 178 exposures, allowing it to function in the vacuum environment without atmospheric interference.^[10]^[13]^[12] During the mission, the FUVE achieved pioneering far-UV observations, including the first images of Earth's geocorona and upper atmosphere from the lunar surface, revealing spatial distributions and intensities of emissions from atomic hydrogen, atomic oxygen, and molecular nitrogen below 1600 Å. It also captured spectra of celestial targets such as star clusters, nebulae, and the Large Magellanic Cloud, providing data on interplanetary medium and distant astronomical objects. These results offered new insights into UV emissions from Earth's polar auroras, tropical airglow, and atmospheric species, with some spectrographic detections occurring for the first time.^[14]^[10]^[13] The legacy of the Far Ultraviolet Camera/Spectrograph lies in demonstrating the feasibility of ultraviolet instrumentation for space-based astronomy in vacuum conditions, free from Earth's atmospheric absorption, and validating electronographic techniques for photon flux detection in low-light regimes. Its success paved the way for future lunar observatories and influenced subsequent UV missions, highlighting the Moon's potential as a platform for high-resolution astronomical studies. Dr. Carruthers' contributions were recognized with the National Medal of Technology and Innovation in 2012.^[12]^[13]^[11]

Information Technology

Universal Virtual Computer

The Universal Virtual Computer (UVC) is a standardized virtual machine environment designed for the long-term preservation of digital objects, enabling their executability and rendering regardless of future hardware or software changes. It achieves this by providing a simple, Turing-complete computational platform that isolates essential data and functionality from platform-specific dependencies, ensuring that archived software and files remain accessible without reliance on obsolete technology. This approach addresses the core challenge of digital obsolescence by transforming complex, proprietary formats into self-contained UVC programs that can be emulated on any sufficiently capable future system. The UVC concept originated in the early 2000s through collaborative research led by Raymond A. Lorie at IBM, in partnership with the Koninklijke Bibliotheek (National Library of the Netherlands), as part of broader efforts to develop sustainable digital preservation strategies. Initial proof-of-concept work was documented in a 2002 technical report, which outlined the UVC as a response to the limitations of traditional migration techniques that require repeated format conversions over time. This foundational effort was extended in subsequent studies, including implementations tested on vintage supercomputers to validate cross-platform compatibility, and it influenced preservation frameworks adopted by institutions focused on archival stability. Key components of the UVC include a minimal instruction set of fewer than 40 operations—covering basic tasks such as data copying, arithmetic, branching, and input/output—along with unbounded, bit-addressable memory segments and unlimited registers to support flexible program execution. It employs scripting mechanisms to facilitate software migration and rendering, where original digital objects are accompanied by UVC-compatible decoder programs that handle format-specific logic, such as decompressing or interpreting files. Metadata standards, including ASCII-based documentation for the program's alphabet, schema, and invocation procedures, ensure unambiguous reconstruction, thereby preventing loss of authenticity in preserved artifacts. The design emphasizes simplicity to minimize emulation overhead, with computational complexity kept low due to the abstract machine's efficiency in handling essential operations without unnecessary hardware emulation.^[15] In practice, UVC implementation involves creating virtual appliances that bundle digital objects with their rendering scripts and metadata, allowing archives to run preserved content on modern systems via lightweight emulators. For instance, 1980s software, such as early image viewers or document editors, can be maintained by converting their executables into UVC code, enabling playback without the original hardware like floppy drives or specific CPUs. This method proves cost-effective for large-scale archives, as it reduces the need for ongoing migrations and hardware replication, while the low overhead of UVC emulation—typically involving straightforward interpretation rather than full system simulation—supports scalable preservation without prohibitive resource demands.^[15]

USB Video Device Class

The USB Video Device Class (UVC) is a standardized USB device class specification developed by the USB Implementers Forum (USB-IF) to enable the streaming of video data and still images from compatible devices, such as webcams and digital camcorders, directly to host computers without requiring vendor-specific drivers.^[16] This protocol defines the necessary descriptors, control requests, and data transfer mechanisms to ensure interoperability across USB hosts, allowing devices to expose their video capabilities through a unified interface.^[17] By classifying video functions under base class code 0x0E, UVC facilitates seamless integration for capture and processing of video streams in real time.^[18] The specification's development began with the release of UVC 1.0 on September 4, 2003, which introduced core support for basic video streaming over USB 2.0.^[17] Subsequent revisions addressed enhancements and errata: version 1.0a followed on December 4, 2003, with minor clarifications; version 1.1 was issued on June 1, 2005, improving descriptor structures and adding support for additional controls; and version 1.5, the latest as of 2012, extended compatibility to USB 3.0 for higher bandwidth applications while incorporating support for advanced formats and processing units.^[17] These updates have progressively enabled higher resolutions, such as up to 1080p at 30 fps or more, depending on USB speed.^[16] Technically, UVC supports a range of video formats, including compressed options like Motion JPEG (MJPEG), H.264/AVC, MPEG-2 Transport Stream (TS/PS), and DV, as well as uncompressed formats such as YUV variants (e.g., YUY2, NV12) for raw pixel data transfer.^[17] It utilizes isochronous endpoints for time-sensitive video payloads on USB 2.0 (up to 480 Mbps) and extends to bulk or isochronous transfers on USB 3.0 (up to 5 Gbps), ensuring low-latency streaming suitable for applications requiring real-time performance.^[19] Native driver support is built into major operating systems, including Windows via the AVStream minidriver (since Windows XP SP2), Linux through the uvcvideo kernel module, and macOS with its integrated UVC framework, promoting plug-and-play operation.^[19]^[20] UVC finds primary applications in consumer and professional video capture devices, including webcams for video conferencing platforms like Zoom, surveillance systems, and hybrid digital cameras that output both stills and video streams.^[21] This standardization simplifies integration in scenarios such as remote work setups and live streaming, where devices can be recognized and utilized immediately upon connection. For compliance, manufacturers must implement the full set of UVC descriptors and pass USB-IF certification tests, which verify adherence to the specification through interoperability and functional validation to maintain ecosystem reliability.^[22]^[17]

Other Uses

Umbilical Venous Catheter

An umbilical venous catheter (UVC) is a thin, flexible tube inserted into a newborn's umbilical vein to provide central venous access for administering fluids, medications, total parenteral nutrition, or blood products.^[23] This device is particularly valuable in neonatal intensive care units (NICUs) for premature or critically ill infants, where peripheral vein access may be challenging or insufficient, allowing for reliable delivery of therapies without repeated invasive procedures.^[24] UVCs are typically used in the immediate postnatal period, up to 14 days of age, as the umbilical vein remnant remains patent during this time.^[23] The insertion procedure occurs shortly after birth through the remnant of the umbilical cord stump under sterile conditions. The catheter, commonly made of polyurethane or silicone for biocompatibility and radiopacity, is advanced into the umbilical vein, with a typical insertion depth of 5-8 cm in term infants, adjusted based on formulas incorporating the infant's weight (e.g., [(3 × weight in kg) + 9]/2 + 1 cm).^[25]^[26] Proper positioning, ideally at the junction of the inferior vena cava and right atrium, is confirmed via X-ray to avoid malposition in hepatic vessels, which can lead to complications.^[23] Recent advancements include real-time ultrasound guidance to enhance accuracy, reduce manipulations, and minimize radiation exposure during placement. Potential risks associated with UVCs include infection, such as catheter-related bloodstream infections, thrombosis, and vascular perforation or extravasation leading to hepatic injury.^[27] Guidelines from the American Academy of Pediatrics recommend limiting UVC use to less than 7-10 days to mitigate these risks, with prompt removal once alternative access is established.^[28] Introduced in the 1950s primarily for exchange transfusions in jaundiced neonates, UVC technology has evolved with improved materials and imaging techniques to support broader applications in modern neonatal care.^[29]

Uniform Vehicle Code

The Uniform Vehicle Code (UVC) serves as a model set of motor vehicle laws designed to provide a standardized framework for regulating traffic, vehicles, and drivers across the United States. It encompasses rules of the road, driver licensing requirements, vehicle registration and titling procedures, equipment standards, accident reporting, and enforcement mechanisms, aiming to promote consistency in state-level legislation to enhance road safety and facilitate interstate travel. Developed as a non-binding template, the UVC allows states to adopt its provisions in whole or in part, addressing key areas such as speed limits, driving under the influence (DUI) penalties, and traffic control devices to minimize variations that could confuse drivers or hinder enforcement.^[30]^[31] The UVC was first drafted in 1926 by the National Conference on Street and Highway Safety, under the leadership of then-Commerce Secretary Herbert Hoover, in response to the growing number of automobiles and rising traffic accidents. It was subsequently maintained and revised by the National Committee on Uniform Traffic Laws and Ordinances (NCUTLO), with major updates in 1968 to streamline licensing categories and in 1992 to incorporate commercial motor vehicle safety standards from the Commercial Motor Vehicle Safety Act. The most recent comprehensive revision, known as the Millennium Edition, was published in 2000, incorporating changes since 1995, including model laws on graduated licensing, child restraints, and DUI prevention; NCUTLO suspended operations in 2008, leaving the 2000 edition as the latest version.^[32]^[33]^[31] Key contents of the UVC are organized into 18 chapters, beginning with definitions of terms like "vehicle" and "driver's license" in Chapter 1, followed by highway safety administration in Chapter 2, and extending to detailed provisions on certificates of title and registration (Chapter 3), theft laws (Chapter 4), dealer licensing (Chapter 5), driver's licenses including commercial endorsements and disqualifications (Chapter 6), financial responsibility and insurance (Chapter 7), civil liability (Chapter 9), accident reporting duties (Chapter 10), and rules of the road covering right-of-way, speed restrictions, and DUI offenses (Chapter 11). Subsequent chapters address vehicle equipment standards such as lighting and brakes (Chapter 12), safety inspections (Chapter 13), size and weight limits (Chapter 14), state and local authority powers (Chapter 15), arrest procedures (Chapter 16), post-conviction remedies (Chapter 17), and the code's overall effect and title (Chapter 18). These elements promote uniformity in areas like establishing a national standard for DUI blood alcohol concentration limits at 0.08% and consistent speed limits, such as 55 mph on interstate highways where adopted.^[31]^[33] While not mandatory, the UVC has significantly influenced the development of state vehicle codes, with most of the 50 states adopting substantial portions of its provisions to form the basis of their traffic laws, though local variations persist to accommodate regional needs like urban density or rural conditions. It is widely used for law enforcement training, judicial education, and policy development by organizations such as the National Highway Traffic Safety Administration (NHTSA) and state departments of transportation. For instance, uniform adoption of UVC-inspired rules on seat belt use and child restraints has been integrated into state statutes, supporting broader highway safety programs.^[34]^[30] The UVC's emphasis on standardization seeks to reduce traffic accidents by ensuring predictable rules and consistent enforcement nationwide, contributing to long-term safety gains. Following its initial adoption and revisions, the U.S. motor vehicle fatality rate per 100 million vehicle miles traveled (VMT) declined dramatically from approximately 18 in 1925 to 1.7 by 1999, reflecting improvements in legislation, vehicle technology, and infrastructure that the UVC helped facilitate through model provisions on licensing, equipment, and impaired driving. This trend underscores the code's role in fostering safer roadways, though ongoing variations among states highlight the need for continued alignment.^[35]^[36]

References

[1]
Ultraviolet (UV) Radiation | FDA
Aug 19, 2020 · Q: What is UVC Radiation? A: UVC radiation is the highest energy portion of the UV radiation spectrum. UVC radiation from the sun does not ...
[2]
Ultraviolet Light | Definition, Uses & Examples - Lesson - Study.com
Ultraviolet light is a type of electromagnetic radiation that is not visible to the human eye. It has wavelengths shorter and frequency higher than visible ...
[3]
Ultraviolet Waves - NASA Science
Aug 4, 2023 · UV-C rays are the most harmful and are almost completely absorbed by our atmosphere. UV-B rays are the harmful rays that cause sunburn. Exposure ...
[4]
Ultraviolet C Radiation - an overview | ScienceDirect Topics
UV-C radiation is defined as ultraviolet radiation with a wavelength of approximately 254 nm, which leads to DNA damage primarily in the form of cyclobutane ...
[5]
About Germicidal Ultraviolet (GUV) | Ventilation - CDC
Oct 4, 2024 · However, UV energy directed or reflected into the occupied space has the potential to cause temporary eye or skin damage. Assistance from a ...
[6]
[PDF] ULTRAVIOLET DISINFECTION GUIDANCE MANUAL FOR THE ...
The purpose of this guidance manual is solely to provide technical information on the application of ultraviolet light for the disinfection of drinking water by ...
[7]
Ultraviolet (UV) radiation safety - University of Nevada, Reno
Commonly used PPE against UV are UV safety goggles, UV face shields, long-sleeved, tightly-woven clothing that covers much of the body, and gloves. Application ...3.1. Uv Radiation Eye... · 4. Uv Radiation Exposure... · 5. Uv Control Measures<|control11|><|separator|>
[8]
[PDF] Protecting Workers from Ultraviolet Radiation - ICNIRP
It develops international guidelines on limits of exposure to non-ionizing radiations which are independent and science based; provides science based guidance ...
[9]
Ultraviolet (UV) radiation - World Health Organization (WHO)
Mar 9, 2016 · The UV radiation spectrum is divided into three regions called UVA, UVB and UVC. As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ...Missing: properties | Show results with:properties
[10]
Essentials of Germicidal Irradiation for Reduction of Microorganisms
UV-C wavelengths (200 to 280 nm) are readily absorbed by the DNA and RNA of microorganisms. When absorbed, UVGI damages the structure of the DNA by forming ...Missing: key properties
[11]
Energy of Photon - PVEducation.Org
There is an inverse relationship between the energy of a photon (E) and the wavelength of the light (λ) given by the equation: Photon Energy · E = h c λ.Missing: UVC | Show results with:UVC
[12]
Niels Ryberg Finsen – Facts - NobelPrize.org
Since the 1870s it was known that ultraviolet light had an inhibiting effect on bacteria, and Niels Ryberg Finsen thought tissues that had been attacked by ...Missing: C spectroscopy 20th germicidal 1910
[13]
Germicidal UV Sources and Systems - PMC - PubMed Central - NIH
Excimer lamps are quasimonochromatic sources that emit over a wide range of the UV region depending on the gas used.
[14]
Ultraviolet Radiation - HPS - The Health Physics Society
The sun is our primary natural source of UV radiation. Artificial sources include tanning booths, black lights, curing lamps, germicidal lamps, mercury vapor ...
[15]
UV Disinfection for COVID-19 - International Ultraviolet Association Inc
UV disinfection, specifically UVC, can help reduce COVID-19 transmission by inactivating the virus on surfaces and air, as a secondary barrier to cleaning.Missing: purification | Show results with:purification
[16]
Remembering the First Moon-Based Telescope - NASA
Jul 15, 2019 · The telescope, called the Far Ultraviolet Camera/Spectrograph, looked at distant objects in ultraviolet light, a type of radiation invisible to ...
[17]
Camera, Lunar Surface Ultraviolet, Apollo 16
It represents a telescopic camera that was flown to the moon on Apollo 16. Built by George Carruthers at the Naval Research Laboratory.
[18]
Apollo 16 Far-Ultraviolet Camera/Spectrograph: Instrument and Operations
### Summary of Apollo 16 Far-Ultraviolet Camera/Spectrograph
[19]
Looking Back: Dr. George Carruthers and Apollo 16 Far Ultraviolet ...
Dec 29, 2020 · Dr. George Carruthers, a scientist at the Naval Research Laboratory, stands to the right of his invention, the gold-plated ultraviolet camera/spectrograph.
[20]
Apollo 16 far-ultraviolet camera/spectrograph - Earth observations.
A far-ultraviolet camera/spectrograph experiment was operated on the lunar surface during the Apollo 16 mission. Among the data obtained were images and spectra ...
[21]
https://www.synopsys.com/blogs/chip-design/uvc-device-video-streaming.html
[22]
Video Class v1.5 document set - USB-IF
Aug 9, 2012 · The Video Class v1.5 document set includes the UVC v1.5 Class specification, USB Video Example v1.5, USB Video FAQ v1.5, and various USB Video ...
[23]
[PDF] USB Device Class Definition for Video Devices - Amazon AWS
Aug 9, 2012 · USB-IF AND THE AUTHORS OF THIS SPECIFICATION ALSO. DO NOT WARRANT OR ... device must support to comply with the USB Video Class specification.
[24]
Defined Class Codes | USB-IF
Base Class 0Eh (Video). This base class is defined for devices that conform to the Video Device Class Specification found on the USB-IF website. That ...
[25]
USB Video Class Driver Overview - Windows drivers - Microsoft Learn
Dec 18, 2024 · Compressed formats: MJPEG, DV, Supported, Supported ; Uncompressed formats: YUY2, NV12, Supported, Supported ; Supports both capture and render ...
[26]
Linux UVC driver & tools - Ideas on board
Welcome to the USB Video Class Linux device driver home. The goal of this project is to provide all necessary software components to fully support UVC ...Introduction · Status · Supported devices
[27]
USB Video Class (UVC) Explained: Revolutionizing Video Transfer
Dec 5, 2012 · Discover the transformative power of USB Video Class (UVC) in streamlining video transfer across various devices.Missing: formats | Show results with:formats
[28]
Compliance | USB-IF
The USB-IF has instituted a Compliance Program that provides reasonable measures of acceptability. The Compliance Program uses multiple test specifications.USB-IF Compliance Update · Compliance Tools · USB4® Compliance
[29]
Umbilical Vein Catheterization - StatPearls - NCBI Bookshelf
Umbilical vein catheterization utilizes the exposed umbilical stump in a neonate as a site for emergency central venous access up to 14 days old.
[30]
Umbilical catheters : MedlinePlus Medical Encyclopedia
Nov 6, 2023 · An umbilical venous catheter (UVC) allows fluids and medicines to be given without frequently replacing an intravenous (IV) line. A UVC may be ...
[31]
[PDF] Intravascular Catheters
Usually, an umbilical arterial catheter (UAC) is used. Peripheral arterial catheters are indicated when: •Catheterization of umbilical artery was unsuccessful.
[32]
Umbilical Vascular Catheterization - New England Journal of Medicine
Oct 9, 2008 · This video will demonstrate the placement of catheters in the umbilical vein and the umbilical artery. Careful preparation, sterile technique, ...
[33]
Standardizing Umbilical Catheter Usage in Preterm Infants | Pediatrics
Jun 1, 2014 · However, umbilical catheter use can cause life-threatening complications including central line–associated bloodstream infection (CLABSI),4,–8 ...Planning the Intervention (Pilot... · Interventions and Rollout · Secondary Outcomes
[34]
Umbilical Catheters | PCEP Book 3: Neonatal Care - AAP Publications
UVCs should not be in place longer than 7 to 10 days because of an increased risk of catheter-associated bloodstream infections and other complications. UACs ...
[35]
Historical Perspectives: The Rise and Fall of Exchange Transfusion
Jul 1, 2003 · As noted in the accompanying commentaries, the first umbilical venous catheters were inserted for the purpose of exchange transfusion.
[36]
Chapter 4. Uniform Vehicle Code - FHWA Office of Operations
The UVC was a publication developed by the National Committee on Uniform Traffic Laws and Ordinances (NCUTLO). It was designed to provide a comprehensive guide ...
[37]
[PDF] Millennium Edition of the Uniform Vehicle Code, - I Am Traffic
This edition contains all changes to the UVC since the reorganization and revitalization of the Committee in 1995, which are significant. Many changes were ...Missing: history | Show results with:history
[38]
Chapter 3. Traffic Laws and Regulations - FHWA Office of Operations
The first version of the Uniform Vehicle Code (UVC) appeared in 1926. The first Manual on Uniform Traffic Control Devices (MUTCD) was compiled by the American ...Missing: NCUTLO | Show results with:NCUTLO
[39]
[PDF] NCUTLO: Uniform Vehicle Code and Model Ordinance
FOREWORD. This volume contains the 1968 revised editions of the Uniform. Vehicle Code and Model Traffic Ordinance. Although published.
[40]
Uniform Vehicle Code | The Center for Cycling Education
This is a recommended text for traffic laws that individual states are encouraged (but not required) to adopt in whole or in part.Missing: website | Show results with:website
[41]
Achievements in Public Health, 1900-1999 Motor-Vehicle Safety
Despite this steep increase in motor-vehicle travel, the annual death rate has declined from 18 per 100 million vehicle miles traveled (VMT) in 1925 to 1.7 per ...
[42]
Traffic Safety: Then, Now and the Future - NHTSA
The last five decades show incredible improvements, as traffic deaths have dropped from more than 52,000 lives lost in 1970 to about 36,000 in 2019*. The ...