Universal design explained

Universal design is the design of buildings, products or environments to make them accessible to people, regardless of age, disability, or other factors. It emerged as a rights-based, anti-discrimination measure, which seeks to create design for all abilities. Evaluating material and structures that can be utilized by all.^[1] It addresses common barriers to participation by creating things that can be used by the maximum number of people possible.^[2] “When disabling mechanisms are to be replaced with mechanisms for inclusion, different kinds of knowledge are relevant for different purposes. As a practical strategy for inclusion, Universal Design involves dilemmas and often difficult priorities.” Curb cuts or sidewalk ramps, which are essential for people in wheelchairs but also used by all, are a common example of universal design.

History

The term universal design was coined by the architect Ronald Mace to describe the concept of designing all products and the built environment to be aesthetic and usable to the greatest extent possible by everyone, regardless of their age, ability, or status in life.^[3] However, due to some people having unusual or conflicting access needs, such as a person with low vision needing bright light and a person with photophobia needing dim light, universal design does not address absolutely every need for every person in every situation.

Universal design emerged from slightly earlier barrier-free concepts, the broader accessibility movement, and adaptive and assistive technology and also seeks to blend aesthetics into these core considerations. As life expectancy rises and modern medicine increases the survival rate of those with significant injuries, illnesses, and birth defects, there is a growing interest in universal design. There are many industries in which universal design is having strong market penetration but there are many others in which it has not yet been adopted to any great extent. Universal design is also being applied to the design of technology, instruction, services, and other products and environments. Several different fields, such as engineering, architecture, and medicine collaborate in order to effectively create accessible environments that can lend to inclusion for a variety of disabilities.^[4] It can change the socio-material relationships people have with spaces and environments and create positive experiences for all kinds of abilities. Which allows for meaningful participation across multiple demographics experiencing disability.

Barrier-free design

In 1960, specifications for barrier-free design were published as a compendium of over 11 years of disability ergonomic research. In 1961, the American National Standard Institute (ANSI) A1171.1 specifications were published as the first Barrier Free Design standard. It presented criteria for designing facilities and programs for use by individuals with disabilities. The research started in 1949 at the University of Illinois Urbana-Champaign and continues to this day. The principal investigator, Dr. Timothy Nugent, who is credited in the 1961, 1971, and 1980 standards, also started the National Wheelchair Basketball Association.

The ANSI A117.1 standard was adopted by the US federal government General Services Administration under the Uniform Federal Accessibility Standards (UFAS) in 1984, then in 1990 for American with Disabilities Act (ADA). The archived research documents are at the International Code Council (ICC) - ANSI A117.1 division. Dr. Nugent made presentations around the globe in the late 1950s and 1960s presenting the concept of independent functional participation for individuals with disabilities through program options and architectural design.

Another comprehensive publication by the Royal Institute of British Architects published three editions 1963, 1967, 1976 and 1997 of Designing for the Disabled by Selwyn Goldsmith UK. These publications contain valuable empirical data and studies of individuals with disabilities. Both standards are excellent resources for the designer and builder.

Disability ergonomics should be taught to designers, engineers, non-profits executives to further the understanding of what makes an environment wholly tenable and functional for individuals with disabilities.

In October 2003, representatives from China, Japan, and South Korea met in Beijing and agreed to set up a committee to define common design standards for a wide range of products and services that are easy to understand and use. Their goal is to publish a standard in 2004 which covers, among other areas, standards on containers and wrappings of household goods (based on a proposal from experts in Japan), and standardization of signs for public facilities, a subject which was of particular interest to China as it prepared to host the 2008 Summer Olympics.

Design for All

Selwyn Goldsmith, author of Designing for the Disabled (1963), pioneered the concept of free access for people with disabilities. His most significant achievement was the creation of the dropped curb – now a standard feature of the built environment.

The term Design for All (DfA) is used to describe a design philosophy targeting the use of products, services and systems by as many people as possible without the need for adaptation. "Design for All is design for human diversity, social inclusion and equality" (EIDD Stockholm Declaration, 2004). According to the European Commission, it "encourages manufacturers and service providers to produce new technologies for everyone: technologies that are suitable for the elderly and people with disabilities, as much as the teenage techno wizard."^[5] The origin of Design for All^[6] lies in the field of barrier-free accessibility for people with disabilities and the broader notion of universal design.

Design for All has been highlighted in Europe by the European Commission in seeking a more user-friendly society in Europe. Design for All is about ensuring that environments, products, services and interfaces work for people of all ages and abilities in different situations and under various circumstances.

Design for All has become a mainstream issue because of the aging of the population and its increasingly multi-ethnic composition. It follows a market approach and can reach out to a broader market. Easy-to-use, accessible, affordable products and services improve the quality of life of all citizens. Design for All permits access to the built environment, access to services and user-friendly products which are not just a quality factor but a necessity for many aging or disabled persons. Including Design for All early in the design process is more cost-effective than making alterations after solutions are already in the market. This is best achieved by identifying and involving users ("stakeholders") in the decision-making processes that lead to drawing up the design brief and educating public and private sector decision-makers about the benefits to be gained from making coherent use of Design (for All) in a wide range of socio-economic situations

In information and communication technology (ICT)

See main article: article and Design for All (in ICT).

Design for All criteria are aimed at ensuring that everyone can participate in the Information society. The European Union refers to this under the terms eInclusion and eAccessibility. A three-way approach is proposed: goods which can be accessed by nearly all potential users without modification or, failing that, products being easy to adapt according to different needs, or using standardized interfaces that can be accessed simply by using assistive technology. To this end, manufacturers and service providers, especially, but not exclusively, in the Information and Communication Technologies (ICT), produce new technologies, products, services and applications for everyone.

European organizational networks

In Europe, people have joined in networks to promote and develop Design for All:

• The European Design for All eAccessibility Network (EDeAN)^[7] was launched under the lead of the European Commission and the European Member States in 2002. It fosters Design for All for eInclusion, that is, creating an information society for all. It has national contact centres (NCCs) in almost all EU countries and more than 160 network members in national networks.
• EIDD - Design for All Europe is a NGO and a 100% self-financed European organization that covers the entire area of theory and practice of Design for All, from the built environment and tangible products to communication, service and system design. Originally set up in 1993 as the European Institute for Design and Disability (EIDD), to enhance the quality of life through Design for All, it changed its name in 2006 to bring it into line with its core business. EIDD - Design for All Europe disseminates the application of Design for All to business and administration communities previously unaware of its benefits and currently (2016) has 31 member organizations in 20 European countries.^[8]
• EuCAN - The European Concept for Accessibility Network started in 1984 as an open network of experts and advocates from all over Europe in order to promote and support the Design for All approach.^[9] The coordination work of EuCAN and the functioning of the network are mainly voluntary work. In 1999 the Luxembourg Disability Information and Meeting Centre (better known by its acronym “Info-Handicap”) took over the coordination of the steering group, together with the implicit responsibility for the follow-up of the European Concept for Accessibility (ECA). The EuCAN publications - like ECA - aim to provide practical guidance. They are neither academic nor policy documents.

Principles and goals

The Center for Universal Design at North Carolina State University expounded the following principles:^[10]

1. Equitable use
2. Flexibility in use
3. Simple and intuitive
4. Perceptible information
5. Tolerance for error
6. Low physical effort
7. Size and space for approach and use

Each principle is broader than those of accessible design or barrier-free design contains and few brief guidelines that can be applied to design processes in any realm: physical or digital.

Goals

In 2012, the Center for Inclusive Design and Environmental Access at the University at Buffalo expanded the definition of the principles of universal design to include social participation and health and wellness. Rooted in evidence based design, the 8 goals of universal design were also developed.^[11]

1. Body Fit
2. Comfort
3. Awareness
4. Understanding
5. Wellness
6. Social Integration
7. Personalization
8. Cultural Appropriateness

The first four goals are oriented to human performance: anthropometry, biomechanics, perception, cognition. Wellness bridges human performance and social participation. The last three goals addresses social participation outcomes. The definition and the goals are expanded upon in the textbook "Universal Design: Creating Inclusive Environments."^[12]

The "barrier-free" concept

building modification consists of modifying buildings or facilities so that they can be used by people who are disabled or have physical impairments. The term is used primarily in Japan and other non-English speaking countries (e.g. German: Barrierefreiheit; Finnish: esteettömyys), while in English-speaking countries, terms such as "accessibility" and "accessible" dominate in everyday use. An example of barrier-free design would be installing a ramp for wheelchair users alongside steps. In the late 1990s,, for example poor public street lighting.^[13] In the case of new buildings, however, the idea of barrier-free modification has largely been superseded by the concept of universal design, which seeks to design things from the outset to support easy access.

Freeing a building of barriers means:

• Recognizing the features that could form barriers for some people,
• Thinking inclusively about the whole range of impairment and disability,
• Reviewing everything - from structure to smallest detail,
• Seeking feedback from users and learning from mistakes.

Barrier-free is also a term that applies to accessibility in situations where legal codes such as the Americans with Disabilities Act of 1990 applies. The process of adapting barrier-free public policies started when the Veterans Administration and US President's Committee on Employment of the Handicapped noticed a large amount of US citizens coming back from the Vietnam War injured and unable to navigate public spaces.The ADA is a law focusing on all building aspects, products and design that is based on the concept of respecting human rights. It doesn't contain design specifications directly.

An example of a country that has sought to implement barrier-free accessibility in housing estates is Singapore. Within five years, all public housing estates in the country, all 7,800 blocks of apartments, have benefited from the program.^[14]

Barrier-free design examples

The types of Universal Design elements vary dependent on the targeted population and the space. For example, in public spaces, universal design elements are often broad areas of accessibility while in private spaces, design elements address the specific requirements of the resident.^[15] Examples of these design elements are varied and leverage different approaches for different effects. Some examples include:

Communication

• Bright and appropriate lighting, particularly task lighting
• Auditory output redundant with information on visual displays
• Visual output redundant with information in auditory output
• Contrast controls on visual output
• Use of meaningful icons with text labels
• Clear lines of sight to reduce dependence on sound
• Volume controls on auditory output
• Speed controls on auditory output
• Choice of language on speech output
• Signs with light-on-dark visual contrast
• Web pages that provide alternative text to describe images
• Instruction that presents material both orally and visually
• Labels in large print on equipment control buttons
• Audio description, closed captioning

Access and mobility

• Public transit systems with low-floor buses that "kneel" (bring their front end to ground level to eliminate gap) and/or are equipped with ramps rather than on-board lifts.^[16]
• Smooth, ground level entrances without stairs
• Surface textures that require low force to traverse on level, less than 5 pounds force per 120 pounds rolling force
• Surfaces that are stable, firm, and slip resistant per ASTM 2047
• Wide interior doors (3'0"), hallways, and alcoves with 60" × 60" turning space at doors and dead-ends
• Functional clearances for approach and use of elements and components
• Ramp access in swimming pools

Ease of use

• Lever handles for opening doors rather than twisting knobs
• Single-hand operation with closed fist for operable components including fire alarm pull stations
• Components that do not require tight grasping, pinching or twisting of the wrist
• Components that require less than 5 pounds of force to operate
• Light switches with large flat panels rather than small toggle switches
• Buttons and other controls that can be distinguished by touch
• "Gesture movements" enabled spaces that may one help control temperature, lighting, social atmosphere, and other sensory qualities of an environment.
• Cabinets with pull-out shelves, kitchen counters at several heights to accommodate different tasks and postures

Design for All example

The following examples of Designs for All were presented in the book Diseños para todos/Designs for All published in 2008 by Optimastudio with the support of Spain's Ministry of Education, Social Affairs and Sports (IMSERSO) and CEAPAT:^[17]

• Audiobook
• Automatic door
• Electric toothbrush
• Flexible drinking straw
• Google
• Low-floor bus
• Q-Drums^[18]
• Tactile paving
• Trolley case (roll along suitcase)
• Velcro

Other useful items for those with mobility limitations:

• Washlet
• Wireless remote controlled power sockets
• Wireless remote controlled window shades

National legislation

• Chile - Ley nº 20.422, "ESTABLECE NORMAS SOBRE IGUALDAD DE OPORTUNIDADES E INCLUSIÓN SOCIAL DE PERSONAS CON DISCAPACIDAD."^[19]
• U.S. - Americans with Disabilities Act of 1990 and Section 508 Amendment to the Rehabilitation Act of 1973^[20] More Disability Rights Laws in the United States:
  • Fair Housing Act ^[21]
  • Voting Accessibility for the Elderly and Handicapped Act
  • Telecommunications Act
  • Air Carrier Access Act
  • National Voter Registration Act
  • Civil Rights for Institutionalized Persons Act
  • Individuals with Disabilities Education Act
  • Architectural Barriers Act
• Italy - legge n. 13/1989; D.M. n. 236/1989; legge n. 104/1992; D.P.R. n. 503/1996; D.P.R. n. 380/2001 (artt. 77–82)
• Australia - Disability Discrimination Act 1992^[22]
• India - Persons with Disabilities (Equal Opportunities, Protection of Rights & Full Participation) Act, 1995
• United Kingdom - Disability Discrimination Act 1995, Disability Discrimination Act 2005 and Equality Act 2010^[23]
• Ireland - Disability Act 2005^[24]
• France - Loi n°2005-102 du 11 février 2005 pour l'égalité des droits et des chances, la participation et la citoyenneté des personnes handicapées^[25] (Act n°2005-102 of 11 February 2005 for equality of rights and of opportunities, for participation and for citizenship of people with disabilities)
• South Korea - Prohibition of Discrimination Against Persons with Disabilities, 2008 ^[26]
• Norway - Discrimination and Accessibility Act of 2009^[27]
• Vietnam - National Law on Persons with Disability, enacted 17 June 2010.^[28]
• Canada - Accessible Canada Act, enacted 11 July 2019.^[29]

Laws and policies related to accessibility or universal design

• Ontario, Canada Web site: Accessibility for Ontarians with Disabilities Act, 2005 . 15 December 2009 . https://web.archive.org/web/20210414104640/https://www.ontario.ca/laws/statute/05a11. 14 April 2021 . 26 July 2013.
• United States of America. Web site: Universal Design and Accessibility . Section508.gov . 30 June 2022 . https://web.archive.org/web/20220629141502/https://www.section508.gov/develop/universal-design/ . 29 June 2022 . General Services Administration . March 2022.
• Mexico City, Mexico. "Claudia Sheinbaum Pardo's Plan for Government."^[30]
  • Document describing 12 points of intention for the government, the following are directly related to accessibility in Mexico City
    • 6. Public Spaces
    • 7. Mobility
    • 9. Human rights and equality
    • 10. Equality and inclusion
• Mexico City, Mexico. "Plaza Pública." Reconstruction Commission.
  • Following the 2017 earthquake that destroyed a lot of Mexico City, this policy was released that involved the public in the rebuilding process, creating a good platform for requesting accessibility and universal design.
• Madrid, Spain. "PLAN ESTRATÉGICO DE DERECHOS HUMANOS DEL AYUNTAMIENTO DE MADRID."
  • A 19-point plan describing the rights of elderly citizens, where the following are directly related to accessibility
    • 11. Right to live free from discrimination and violence
    • 19. Right to a sustainable city environment that provides mobility and quality of life
• The International Organization for Standardization, the European Committee for Electrotechnical Standardization, and the International Electrotechnical Commission have developed standards:
  • CEN/CENELEC Guide 6  - Guidelines for standards developers to address the needs of older persons and persons with disabilities (Identical to ISO/IEC Guide 71, but free for download)
  • ISO 21542:2021 ^[31]  - Building construction — Accessibility and usability of the built environment (available in English and French)
  • ISO 20282-1:2006 ^[32]  - Ease of operation of everyday products - Part 1: Context of use and user characteristics
  • ISO/TS 20282-2:2013 ^[33]  - Usability of consumer products and products for public use — Part 2: Summative test method, published 1 August 2013

Funding agencies

The Rehabilitation Engineering Research Center (RERC)^[34] on universal design in the Built Environment funded by what is now the National Institute on Disability, Independent Living, and Rehabilitation Research completed its activities on September 29, 2021.^[35] Twenty RERCs are currently funded.^[36] The Center for Inclusive Design and Environmental Access at the University at Buffalo is a current recipient.^[37]

Common shortcomings

Aswan case study

One study conducted in Aswan, Egypt published in the Journal of Engineering and Applied Science aimed to explore the accessibility in three administrative buildings in the area.^[38] They were looking for universal design in entrances and exits, circulation of traffic within the building, and wayfinding within the building's services. They decided to focus their case study on administrative buildings in order to exemplify universal design that granted access for all citizens to all locations. Among the buildings, there were some shared issues. The researchers found that vertical movement was difficult for disabled patrons, given that there were no elevators. There was also no dropped curb, no Braille system, and the handles of doors were difficult to open, and there were no sensory indicators such as sounds or visual signs.

This case highlights the importance if demographics when considering needs for universal design. Over 60% of the citizens who use this building on a daily basis are elderly, but there aren't accommodations that are helpful to their capabilities. Along with the lack of tactile features to guide the visually impaired, the space within the building is very congested, especially for one who may not have full physical capabilities and must use a wheelchair. The circulation suffers as a result, as well as the wayfinding in the structure.

Latin America

Guadalajara

Although there have been attempts to create more accessible public and outdoor spaces, the restorations made have ultimately failed to meet the needs of the disabled and elderly.^[30]

Bibliography

• Book: Vega, Eugenio . Crónica del siglo de la peste : pandemias, discapacidad y diseño . Experimenta . Getafe, Madrid . 2022 . 978-84-18049-73-6 . 1298550791 . es.
• Book: Williamson, Bess . Accessible America : a history of disability and design . New York . 2020 . 978-1-4798-0249-4 . 1126545082.

See also

• Autism friendly
• Curb cut effect
• Development plan
• Disability rights movement
• Inclusion (disability rights)
• Inclusive design
• Sensory friendly
• Transgenerational design
• Universal usability
• Urban planning

External links

• Universal Design Product Collection - a digital collection of over 200 products through our two gallery installations of the Unlimited by Design exhibition and a traveling exhibit called "live | work | eat | play." - from the University at Buffalo Libraries

Notes and References

1. Mualla . CONCEPTUAL CHALLENGES BETWEEN UNIVERSAL DESIGN AND DISABILITY IN RELATION TO THE BODY, IMPAIRMENT, AND THE ENVIRONMENT . Mimarlık Fakültesi Dergisi.
2. Web site: 2020-08-03 . How to deal with competing access needs . 2022-10-14 . Independence Australia . en.
3. Web site: Ronald L. Mace. NC State University. College of Design . Raleigh . The Center for Universal Design is currently not active due to funding challenges. . https://web.archive.org/web/20171004210213/https://projects.ncsu.edu/ncsu/design/cud/about_us/usronmace.htm . October 4, 2017 . 2008 . Remembrance . The Center for Universal Design . June 16, 2022 .
4. Book: Advances in design for inclusion: proceedings of the AHFE 2017 International Conference on Design for Inclusion, July 17-21, 2017, the Westin Bonaventure Hotel, Los Angeles, California, USA . 2018 . Springer . 978-3-319-60597-5 . Di Bucchianico . Giuseppe . Advances in intelligent systems and computing . Cham, Switzerland . Kercher . Pete F..
5. European Commission: Design for All (DfA).
6. Web site: The UK Council for Museums, Archives and Libraries . 2013-07-26.
7. Web site: None . dead . https://web.archive.org/web/20031211231505/http://www.edean.org/ . December 11, 2003.
8. Web site: Design for All Europe . 18 March 2018 . EIDD - DfA Europe.
9. Web site: European concept for accessibility . https://web.archive.org/web/20220401120815/http://www.eca.lu/ . 1 April 2022 . 18 March 2018 . www.eca.lu.
10. Web site: 1997-04-01 . The Principles of Universal Design Version 2.0 . 2024-09-12 . Design.ncsu.edu.
11. Web site: The Goals of Universal Design . Center for Inclusive Design and Environmental Access . April 10, 2012 . August 31, 2017.
12. Book: Steinfeld . Edward . Maisel . Jordana . Universal Design: Creating Inclusive Environments . 787849904 . 9781118168455 . Hoboken . Wiley . April 10, 2012 . 408 pages .
13. Book: Caves, R. W. . Encyclopedia of the City . Routledge . 2004 . 4.
14. Web site: 19 November 2012 . Making HDB Towns User Friendly . https://web.archive.org/web/20121129104142/http://mndsingapore.wordpress.com/2012/11/19/making-hdb-towns-user-friendly/ . 29 November 2012 . 18 March 2018 . wordpress.com . Singapore.
15. Persson . Hans . Åhman . Henrik . Yngling . Alexander Arvei . Gulliksen . Jan . November 2015 . Universal design, inclusive design, accessible design, design for all: different concepts—one goal? On the concept of accessibility—historical, methodological and philosophical aspects . Universal Access in the Information Society . en . 14 . 4 . 505–526 . 10.1007/s10209-014-0358-z . 7411507 . 1615-5289.
16. Book: Universal design and visitability : from }} to zoning ]. 2007 . 978-1427618955 . Nasar . Jack L . Columbus OH . 53 . 173818638 . Evans-Cowley . Jennifer.
17. http://www.optimastudio.com/disenosparatodos Feo, Roberto & Hurtado, Rosario & Optimastudio Diseños para Todos/Designs for All Madrid 2008
18. Web site: Q-Drums . Qdrum.co.za . 2013-07-26.
19. Web site: Ley Chile - Ley 20422 - Biblioteca del Congreso Nacional . 3 November 2023 . www.bcn.cl.
20. Web site: Rehabilitation Act of 1973 - United States Access Board. www.access-board.gov. 18 March 2018.
21. Web site: 2023-12-01 . Guide to Disability Rights Laws . 2023-12-02 . ADA.gov . en.
22. Web site: Disability Discrimination Act 1992 . Austlii.edu.au . 2013-07-26.
23. Web site: Disability and the Equality Act 2010 . Direct.gov.uk . 2013-05-30 . 2013-07-26.
24. Web site: DISABILITY ACT 2005 . Irishstatutebook.ie . 2005-07-08 . 2013-07-26.
25. Web site: Loi n°2005-102 du 11 février 2005 pour l'égalité des droits et des chances, la participation et la citoyenneté des personnes handicapées . fr . Legifrance.gouv.fr . 2013-07-26.
26. Web site: (Translated)장애인차별금지 및 권리구제 등에 관한 법률(장애인 차별 금지법) Act on the Prohibition of Discrimination Against Persons with Disabilities, Remedy Against Infringement of Their Rights, etc. . en.
27. Web site: Act relating to a prohibition against discrimination on the basis of disability (the Anti-Discrimination and Accessibility Act) . 3 November 2023 . app.uio.no.
28. Web site: THE LAW ON PERSONS WITH DISABILITIES . dead . https://web.archive.org/web/20140201230039/http://www.drdvietnam.org/nguoi-khuyet-tat/494-the-law-on-persons-with-disabilities-.html . 2014-02-01 . 2023-11-03 . www.drdvietnam.org.
29. Web site: Accessible Canada Act . laws-lois.justice.gc.ca . 2019-07-11 . 2022-04-06.
30. Book: Garcia-Checua, Eva . Advancing urban Rights: Equality and Diversity in the City . Black Rose Books . 2022.
31. Web site: June 16, 2021 . ISO 21542:2021 . ISO.
32. Web site: ISO 20282-1:2006 . dead . https://web.archive.org/web/20050526002209/http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=34122&scopelist=PROGRAMME . May 26, 2005 . ISO.
33. http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=62733 Usability of consumer products and products for public use -- Part 2: Summative test method
34. Reinkensmeyer . David J. . Sarah. Blackstone . Cathy. Bodine . John . Brabyn . David. Brienza . Kevin . Caves . Frank. DeRuyter. How a diverse research ecosystem has generated new rehabilitation technologies: Review of NIDILRR's Rehabilitation Engineering Research Centers . Journal of NeuroEngineering and Rehabilitation . December 2017 . 14 . 1 . 109 . 10.1186/s12984-017-0321-3 . BIoMed Central . 29110728 . 5674748 . 19368471 . 1743-0003 . 909885328 . free .
35. Web site: RERC-UD 2015-2020 . Center for Inclusive Design and Environmental Access . 2020 . https://web.archive.org/web/20210414043614/http://idea.ap.buffalo.edu/projects/rercud-overview/rerc-ud2015/ . 2021-04-14 . School of Architecture and Planning . University at Buffalo .
36. News: United States: Grant Helps Carnegie Mellon, University at Buffalo Improve Transit Access . Mena Report . Al Bawaba . 11 December 2018 . 926165117 . Found through Gale Academic OneFile. .
37. Web site: Who we are? What is universal design? . Center for Inclusive Design and Environmental Access . 2020 . https://web.archive.org/web/20220308164356/http://idea.ap.buffalo.edu/ . 2022-03-08 . School of Architecture and Planning . University at Buffalo . 2013-07-26.
38. Khalil . M. E. . Mohamed . N. A. . Morghany . E. A. . December 2021 . Towards inclusion and diversity in the light of Universal Design: three administrative buildings in Aswan city as case studies . Journal of Engineering and Applied Science . en . 68 . 1 . 10.1186/s44147-021-00020-0 . 1110-1903 . free .