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This wiki content space is specific to CTR, but these accessibility guidelines can be helpful in any context where authors are publishing digital content for research projects or classrooms. Accessibility is required when posting public information on university, state, or federal websites.
Use the WebAIM checklists for specific applications or the U.S Health and Human Services checklist for PDFs. The accessibility tools built into MS Office and other document applications provide a reliable way to check for missing alternative text on images but are not reliable as a sole means for meeting ADA and Section 508 requirements.
Use built-in features to create headings and subheadings. One benefit of using built-in heading styles is that it allows simple creation of a Table of Contents. It also helps you change the style of all headings at the same level if you decide you want the style to be different (e.g. changing the style of all level-3 headings to be italicized instead of bold).
- Module 2: Use Styles to Create Headings (USDOT/GSA Section 508 Community of Practice)
Use built-in features of Word to create lists.
- Module 3: Use Built-in Features to Create Lists (USDOT/GSA Section 508 Community of Practice)
There may be cases when you want a section of content to be arranged in column. Use built-in features to create columns. Do not use a table for formatting the layout of your document.
- Word 2013 & 2016: Requirements to Make a Document Accessible: Columns (Texas Governor's Committee on People with Disabilities)
- Module 4: Use Built-in Features to Organize Content (USDOT/GSA Section 508 Community of Practice)
- Module 5: Use Built-in Features to Create Layout and Data Tables (USDOT/GSA Section 508 Community of Practice)
Only use tables for displaying data relationships. Use built-in features to create tables and keep tables is simple and straight-forward as possible. Define header rows, make header rows repeat across pages, and make sure there is text or other data in all header and data cells (best practice is to not have empty cells).
- Module 5: Use Built-in Features to Create Layout and Data Tables (USDOT/GSA Section 508 Community of Practice)
- Accessible Tables (Michael Molina, Oklahoma DOT, June 9, 2021. NTKN Section 508 Community of Practice)
Figures and non-text objects
There are two major accessibility concerns with regard to images that convey information: whether the information can be perceived by sighted readers who are colorblind and whether the information is also perceived by assistive technology like screen readers.
Alt-Text for Images
Non-text content that is meant to convey information must include "alternative text" that screen readers can use to describe the content (images including photos, charts, graphs, Smart Art, and most equations). This alt-text is not visible on the page, but will be read when people are using assistive technology such as the "Read Aloud" feature in Adobe Reader. It is also used by search engines when indexing online documents and is useful for some AI text mining applications. A reader using audio assistive technologies must be able to obtain the exact information that a sighted reader can, so images containing text must contain all of the text–verbatim–contained in the image unless the image is redundant to the surrounding text.
Helpful tutorials and guides for creating alt-text
- DIAGRAM Center Image Description Guidelines
- Word 2013 & 2016: Requirements to Make a Document Accessible: Figures (Texas Governor's Committee on People with Disabilities)
- "Section 2: Common Mistakes" in the 2010 Social Security Administration Guide: Alternate text for images (4.3 MB PDF)
- UTRGV handout: https://www.utrgv.edu/eolc/_files/2017/posters/handouts/a-guide-to-alternative-text.pdf
- A decision tree for creating alt-text https://www.w3.org/WAI/tutorials/images/decision-tree/
It is generally not necessary to include alt-text on images that are redundant to the text or do not convey meaning. These do need to be specifically marked as decorative (not needing alt-text), though.
- Decorative elements like page borders.
- Recurring instances of a publisher logo that appears in the header of every odd numbered page (include alt-text for the first instance).
- An icon that repeats the text preceding it, meant to provide a visual cue to information already available in the text.
- A bar chart that exactly repeats information provided in a data table and where the chart's only purpose is to provide an alternative visualization of the data in the table.
Tip for multi-component charts, graphs, equations, or Smart Art graphics
If the Word accessibility checker is flagging multiple parts of your image as requiring alt-text, make a screenshot of your figure and re-insert it as a single image so that alt-text can be added to describe the whole image instead of each individual component (e.g., chart lines, arrows, photo collages, photos with overlay drawings, etc). Before replacing your figure with a screenshot, save your original document in case you need to make edits to the figure in the future.
Adding Alt-Text to Images in MS Word
Option 1, run the accessibility checker and toggle through the list of objects that need alt-text:
You can customize your Review ribbon by right-clicking on the ribbon
Option 2, right-click on the image and select "Edit Alt Text":
Color Perceivable with Color Blindness
Transportation researchers often use color to convey meaning, such as red, green, and yellow to show project status or traffic flow. People with different types of color-blindness may not be able to distinguish differences in these colors without another visual indicator. Certain types of color vision deficiency can affect up to 1 in 12 men and 1 in 200 women so this is not an insignificant concern.
Solutions may be to use a key along with different shapes, borders of differing weights, or different line patterns in addition to the different colors. Here are some video modules with addition tips:
Module 11: Use Color and Other Sensory Characteristics Plus Text to Convey Meaning (USDOT/GSA Section 508 Community of Practice)
Color or is sometimes used to emphasize text or to improve visual appeal. Black text on a white background provides an accessible amount of color contrast when read by sighted readers, even those who are colorblind. People with low vision or color-blindness may not be able to distinguish text written with a lighter color on a darker background. They may not be able to distinguish emphasis when a different color is used.
- Module 12: Create the Required Color Contrast (USDOT/GSA Section 508 Community of Practice)
More on Graph design, color, and accessibility
Even if you are color-coding charts, make sure values or labels are included with each bar for screen readers. If the color differences are significant to understanding the chart, make sure that they have sufficient color contrast and difference in darkness for a colorblind user to interpret.
Example 1. The below bar chart includes labels on each bar. Color contrast needs to be checked to make sure that there is enough contrast between the white text (foreground) and the red, orange, blue, and gray bars (background). In addition, if the bar colors are significant and correspond with a key, then the contrast between each bar color also needs to be checked.
- Checked on the Coblis free online colorblindness simulator. In this case, for readers with monochromacy, there is little to no difference between the orange and the gray bars. The difference between the red and the blue bars could also be easily confused.
To check the foreground (text) against the background (bar), review the color codes on WebAIM's Contrast Checker or other tool.
Calculations, equations, formulas, and special characters used to convey scientific or mathematical concepts need to be read accurately by screen readers. There are a few different methods for creating accessible equations in Word, however, this does not mean that the equations will be accessible when converted to PDF. In PDF, all math needs a <formula> tag and alt-text; therefore, currently the only method of creating accessible equations that remain accessible when converted to PDF is to use an image with alt-text (SVG is the recommended image type). Otherwise, alt-text will need to be added after the file is converted to PDF.
Accessibility experts suggest that after saving your source file of editable equations, create a version with images and alt-text. Copy the math equation and then paste as an image and add alt-text.
If this is not feasible, it is recommended to use the free MathType add-in so that the Word file can serve as an accessible backup until an accessible PDF solution can be developed.
- Creating Accessible Equations in Word (UCF Teach Online)
Equations: MathML, Images and LaTeX (Penn State) includes guidance for accessible equations on web pages and converting inaccessible LaTeX to accessible MathML
Tips when adding alt-text for equations
Shortcuts for composing alt-text for complex equations
For matrices, layout, nested fractions, etc., it could be helpful to review MathSpeak super-brief semantics that can be used as shorthand within the alt-text. Mathspeak examples of shorthand for use in alt-text:
"StartFrac" / "EndFrac" bookends for identifying complex fractions
"StartRoot" / "EndRoot" bookends for identifying square root calculations
"l-par" / "r-par" or "l-brace" / "r-brace" for left- and right-parentheses or left- and right-braces
"StartSet" / "EndSet"
"Sub" / "Base" and "Sup" / "Base" for identifying the beginning and end of complex subscripts and superscripts, and "SupSup" to identify a superscript within a superscript
"ModAbove" / "With" and "ModBelow" / "With" to indicate modifiers
- Describing Matrices and binomials
- CMS.gov Section 508 Quick Reference Guide for MS Word 2013 (2-page PDF)
- CMS.gov Microsoft Accessibility Checker (2-page PDF)
- TxDOT Research Library Section 508 web page
- State of Texas DIR EIR accessibility resources for universities and Level Access accessibility training
- AASHTO RAC 2019 Section 508 Compliance Presentation (PDF)
- NOAA Central Library Accessibility LibGuide
- National Transportation Library Accessibility LibGuide
It is a requirement to make sure that your documents are accessible to as many people as possible. Please write reports and other research documentation with accessibility in mind.
"Texas also emphasizes that government agencies and educational institutes more than any other industry or business should follow accessibility guidelines. For this reason, the Texas administrative code (TAC) has sections 206.70, 213.21, and 213.41, all related to website accessibility." --https://www.accessibilitychecker.org/blog/ada-compliance-in-texas/
For tutorials, checklists, and guidelines, see https://www.section508.gov/create/documents/
University Handbook, 2022, Chapter 6 Section 1:
Each university shall provide electronic deliverables that meet federal requirements for digital accessibility (WCAG 2.0 Level AA), particularly alternative text for images, to allow for easy conversion for online, public publication and access meeting legal requirements. If the University does not have the resources to publish an approved deliverable in accordance with RTI’s instructions, the University may contact RTI to discuss potential options. TxDOT may opt to publish the deliverable, using TxDOT or other resources.
University Handbook, 2022, Chapter 1 Section 1:
This handbook, TxDOT’s Research Manual, and the CRIA agreed to with each University, provide an overview and governs certain aspects of the Research Program. Other sources of contractual guidance include individual Project Agreements and Federal Law. Federal Law shall be considered the highest authority should any conflicts arise between these documents. This handbook provides the framework and policies under which Universities may participate in the Research Program and establishes the procedures that implement the policies expressed in the Research Manual. By signing a CRIA, each University, or University system, agrees to TxDOT procedures related to the Research Program, and this handbook presents some of those procedures.
Excerpt from Texas Department of Information Resources https://dir.texas.gov/electronic-information-resources-eir-accessibility/eir-accessibility-roles-responsibilities/eir :
State agencies and institutions of higher education are required to comply with Texas EIR Accessibility statutes and rules to provide accessibility.
TGC 2054.451, enacted in 2005, requires that all state agencies and institutions of higher education, provide state employees and members of the public access to and use of electronic information resources.
1 TAC 213 enacted state standards for procurement, development, or usage of EIR for people with disabilities and also aligns accessibility standards with the federal regulations set forth in Section 508.
Warning when converting from MS Word to PDF
To test color contrast, you need the exact value for each color used. If testing colors that are on a website, try a color picker browser add-on to find this value. For desktop applications, free software such as Paciello Group's free Colour Contrast Analyser may help.
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