Evaluation Report for Public Website of Airport Coordination Netherlands
Report Creator: , May 14, 2021
Evaluation Commissioner: 100% Leiden
Summary of the evaluation findings
This report describes the extent to which the website of Airport Coordination Netherlands (ACNL) complies with WCAG 2.1 Level A + AA (Digitally accessible on government standards list). The web version of this report contains hyperlinks to an extensive description of the officially established standard. This report only shows a brief description of failed results.
Unfortunately, the investigation showed that WCAG 2.1 is not yet fully complied with. The website meets 45 of the 50 success criteria. The studied pages must be improved on 5 success criteria.
Because this survey concerns only part of all pages, a sample, it may be that there are still problems on pages outside the sample. The research is a snapshot. Advances in insight and technological progress mean that components can be assessed differently at a detailed level in the future. New issues can arise through maintenance on the website.
Scope of the evaluation
| Website name | Public Website of Airport Coordination Netherlands |
|---|---|
| Scope of the website | All web content of the public website of Airport Coordination Netherlands located at https://slotcoordination.nl |
| WCAG Version | WCAG 2.1 |
| Conformance target | Level AA |
| Additional evaluation requirements | The report concerns an audit performed in accordance with the evaluation method WCAG-EM described on https://www.w3.org/TR/WCAG-EM |
| Accessibility support baseline | Chrome v90.0.4430.93 |
| Relied upon technologies |
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Overview of audit results
| Principle | Level A | Level AA |
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| 1. Perceivable | 9 / 9 | 11 / 11 |
| 2. Operable | 14 / 14 | 3 / 3 |
| 3. Understandable | 5 / 5 | 5 / 5 |
| 4. Robust | 2 / 2 | 1 / 1 |
| Total | 30 / 30 | 20 / 20 |
Detailed audit results
Principle 1 Perceivable
1.1 Text Alternatives
All non-text content that is presented to the user has a text alternative that serves the equivalent purpose, except for the situations listed below.
- Controls, Input If non-text content is a control or accepts user input, then it has a name that describes its purpose. (Refer to Guideline 4.1 for additional requirements for controls and content that accepts user input.)
- Time-Based Media If non-text content is time-based media, then text alternatives at least provide descriptive identification of the non-text content. (Refer to Guideline 1.2 for additional requirements for media.)
- Test If non-text content is a test or exercise that would be invalid if presented in text, then text alternatives at least provide descriptive identification of the non-text content.
- Sensory If non-text content is primarily intended to create a specific sensory experience, then text alternatives at least provide descriptive identification of the non-text content.
- CAPTCHA If the purpose of non-text content is to confirm that content is being accessed by a person rather than a computer, then text alternatives that identify and describe the purpose of the non-text content are provided, and alternative forms of CAPTCHA using output modes for different types of sensory perception are provided to accommodate different disabilities.
- Decoration, Formatting, Invisible If non-text content is pure decoration, is used only for visual formatting, or is not presented to users, then it is implemented in a way that it can be ignored by assistive technology.
Findings: Missing alternative text on e-airsportslots.aero logo and blue arrow in slider
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1.2 Time-based Media
For prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labeled as such:
- Prerecorded Audio-only An alternative for time-based media is provided that presents equivalent information for prerecorded audio-only content.
- Prerecorded Video-only Either an alternative for time-based media or an audio track is provided that presents equivalent information for prerecorded video-only content.
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Captions are provided for all prerecorded audio content in synchronized media, except when the media is a media alternative for text and is clearly labeled as such.
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An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such.
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Audio description is provided for all prerecorded video content in synchronized media.
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1.3 Adaptable
Information, structure, and relationships conveyed through presentation can be programmatically determined or are available in text.
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When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined.
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Instructions provided for understanding and operating content do not rely solely on sensory characteristics of components such as shape, size, visual location, orientation, or sound.
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Content does not restrict its view and operation to a single display orientation, such as portrait or landscape, unless a specific display orientation is essential.
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The purpose of each input field collecting information about the user can be programmatically determined when:
- The input field serves a purpose identified in the Input Purposes for User Interface Components section; and
- The content is implemented using technologies with support for identifying the expected meaning for form input data.
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1.4 Distinguishable
Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element.
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Findings: Required fields are only distinguished by color
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If any audio on a Web page plays automatically for more than 3 seconds, either a mechanism is available to pause or stop the audio, or a mechanism is available to control audio volume independently from the overall system volume level.
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The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following:
- Large Text Large-scale text and images of large-scale text have a contrast ratio of at least 3:1;
- Incidental Text or images of text that are part of an inactive user interface component, that are pure decoration, that are not visible to anyone, or that are part of a picture that contains significant other visual content, have no contrast requirement.
- Logotypes Text that is part of a logo or brand name has no minimum contrast requirement.
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Findings: Days of other monts and weeks are to light
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Findings: The text: "Drop files here" is to light
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Except for captions and images of text, text can be resized without assistive technology up to 200 percent without loss of content or functionality.
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If the technologies being used can achieve the visual presentation, text is used to convey information rather than images of text except for the following:
- Customizable The image of text can be visually customized to the user's requirements;
- Essential A particular presentation of text is essential to the information being conveyed.
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Content can be presented without loss of information or functionality, and without requiring scrolling in two dimensions for:
- Vertical scrolling content at a width equivalent to 320 CSS pixels;
- Horizontal scrolling content at a height equivalent to 256 CSS pixels;
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The visual presentation of the following have a contrast ratio of at least 3:1 against adjacent color(s):
- User Interface Components Visual information required to identify user interface components and states, except for inactive components or where the appearance of the component is determined by the user agent and not modified by the author;
- Graphical Objects Parts of graphics required to understand the content, except when a particular presentation of graphics is essential to the information being conveyed.
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In content implemented using markup languages that support the following text style properties, no loss of content or functionality occurs by setting all of the following and by changing no other style property:
- Line height (line spacing) to at least 1.5 times the font size;
- Spacing following paragraphs to at least 2 times the font size;
- Letter spacing (tracking) to at least 0.12 times the font size;
- Word spacing to at least 0.16 times the font size.
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Where receiving and then removing pointer hover or keyboard focus triggers additional content to become visible and then hidden, the following are true:
- Dismissable A mechanism is available to dismiss the additional content without moving pointer hover or keyboard focus, unless the additional content communicates an input error or does not obscure or replace other content;
- Hoverable If pointer hover can trigger the additional content, then the pointer can be moved over the additional content without the additional content disappearing;
- Persistent The additional content remains visible until the hover or focus trigger is removed, the user dismisses it, or its information is no longer valid.
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Principle 2 Operable
2.1 Keyboard Accessible
All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except where the underlying function requires input that depends on the path of the user's movement and not just the endpoints.
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If keyboard focus can be moved to a component of the page using a keyboard interface, then focus can be moved away from that component using only a keyboard interface, and, if it requires more than unmodified arrow or tab keys or other standard exit methods, the user is advised of the method for moving focus away.
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If a keyboard shortcut is implemented in content using only letter (including upper- and lower-case letters), punctuation, number, or symbol characters, then at least one of the following is true:
- Turn off A mechanism is available to turn the shortcut off;
- Remap A mechanism is available to remap the shortcut to use one or more non-printable keyboard characters (e.g. Ctrl, Alt, etc);
- Active only on focus The keyboard shortcut for a user interface component is only active when that component has focus.
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2.2 Enough Time
For each time limit that is set by the content, at least one of the following is true:
- Turn off The user is allowed to turn off the time limit before encountering it; or
- Adjust The user is allowed to adjust the time limit before encountering it over a wide range that is at least ten times the length of the default setting; or
- Extend The user is warned before time expires and given at least 20 seconds to extend the time limit with a simple action (for example, "press the space bar"), and the user is allowed to extend the time limit at least ten times; or
- Real-time Exception The time limit is a required part of a real-time event (for example, an auction), and no alternative to the time limit is possible; or
- Essential Exception The time limit is essential and extending it would invalidate the activity; or
- 20 Hour Exception The time limit is longer than 20 hours.
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For moving, blinking, scrolling, or auto-updating information, all of the following are true:
- Moving, blinking, scrolling For any moving, blinking or scrolling information that (1) starts automatically, (2) lasts more than five seconds, and (3) is presented in parallel with other content, there is a mechanism for the user to pause, stop, or hide it unless the movement, blinking, or scrolling is part of an activity where it is essential; and
- Auto-updating For any auto-updating information that (1) starts automatically and (2) is presented in parallel with other content, there is a mechanism for the user to pause, stop, or hide it or to control the frequency of the update unless the auto-updating is part of an activity where it is essential.
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2.3 Seizures and Physical Reactions
Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds.
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2.4 Navigable
A mechanism is available to bypass blocks of content that are repeated on multiple Web pages.
Findings: When using the keyboard a button appears to skip to main content
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If a Web page can be navigated sequentially and the navigation sequences affect meaning or operation, focusable components receive focus in an order that preserves meaning and operability.
Findings: When using tab content that's initially hidden shows up. Needs to be removed.
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The purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context, except where the purpose of the link would be ambiguous to users in general.
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More than one way is available to locate a Web page within a set of Web pages except where the Web Page is the result of, or a step in, a process.
Findings: Search function
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Any keyboard operable user interface has a mode of operation where the keyboard focus indicator is visible.
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2.5 Input Modalities
All functionality that uses multipoint or path-based gestures for operation can be operated with a single pointer without a path-based gesture, unless a multipoint or path-based gesture is essential.
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For functionality that can be operated using a single pointer, at least one of the following is true:
- No Down-Event The down-event of the pointer is not used to execute any part of the function;
- Abort or Undo Completion of the function is on the up-event, and a mechanism is available to abort the function before completion or to undo the function after completion;
- Up Reversal The up-event reverses any outcome of the preceding down-event;
- Essential Completing the function on the down-event is essential.
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For user interface components with labels that include text or images of text, the name contains the text that is presented visually.
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Findings: Read more buttons don't have an (aria)label in name
Findings: Read more buttons don't have an (aria)label in name
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Findings: Textfields don't have an (aria)label in name
Findings: Textfields don't have an (aria)label in name
Findings: Textfields don't have an (aria)label in name
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Functionality that can be operated by device motion or user motion can also be operated by user interface components and responding to the motion can be disabled to prevent accidental actuation, except when:
- Supported Interface The motion is used to operate functionality through an accessibility supported interface;
- Essential The motion is essential for the function and doing so would invalidate the activity.
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Principle 3 Understandable
3.1 Readable
The default human language of each Web page can be programmatically determined.
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The human language of each passage or phrase in the content can be programmatically determined except for proper names, technical terms, words of indeterminate language, and words or phrases that have become part of the vernacular of the immediately surrounding text.
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3.2 Predictable
When any component receives focus, it does not initiate a change of context.
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Changing the setting of any user interface component does not automatically cause a change of context unless the user has been advised of the behavior before using the component.
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Navigational mechanisms that are repeated on multiple Web pages within a set of Web pages occur in the same relative order each time they are repeated, unless a change is initiated by the user.
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Components that have the same functionality within a set of Web pages are identified consistently.
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3.3 Input Assistance
If an input error is automatically detected, the item that is in error is identified and the error is described to the user in text.
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If an input error is automatically detected and suggestions for correction are known, then the suggestions are provided to the user, unless it would jeopardize the security or purpose of the content.
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For Web pages that cause legal commitments or financial transactions for the user to occur, that modify or delete user-controllable data in data storage systems, or that submit user test responses, at least one of the following is true:
- Reversible Submissions are reversible.
- Checked Data entered by the user is checked for input errors and the user is provided an opportunity to correct them.
- Confirmed A mechanism is available for reviewing, confirming, and correcting information before finalizing the submission.
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Principle 4 Robust
4.1 Compatible
In content implemented using markup languages, elements have complete start and end tags, elements are nested according to their specifications, elements do not contain duplicate attributes, and any IDs are unique, except where the specifications allow these features.
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For all user interface components (including but not limited to: form elements, links and components generated by scripts), the name and role can be programmatically determined; states, properties, and values that can be set by the user can be programmatically set; and notification of changes to these items is available to user agents, including assistive technologies.
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In content implemented using markup languages, status messages can be programmatically determined through role or properties such that they can be presented to the user by assistive technologies without receiving focus.
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Sample of audited web pages
- Home https://slotcoordination.nl/
- News https://slotcoordination.nl/news/
- Events https://slotcoordination.nl/events/
- Contact https://slotcoordination.nl/contact/
- Airline Identification Form https://slotcoordination.nl/airline-identification-form/
- Transfer Form https://slotcoordination.nl/transfer-form/
- How to Request a Slot https://slotcoordination.nl/slot-allocation/how-to-request-a-slot/
- Amsterdam Airport Schiphol https://slotcoordination.nl/general-aviation/amsterdam-airport-schiphol/
Related WCAG 2 resources
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Web Content Accessibility Guidelines (WCAG)
Overview: www.w3.org/WAI/intro/wcag -
How to Meet WCAG 2.1 Quick Reference
www.w3.org/WAI/WCAG21/quickref/ -
WCAG Evaluation Methodology (WCAG-EM)
Overview: www.w3.org/WAI/eval/conformance
