Tools & Wizards About Us
blinddriverchallenge.org screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 89

    SEO

    Google-friendlier than
    67% of websites

blinddriverchallenge.org

Blind Driver Challenge | National Federation of the Blind

Page Load Speed

5.7 sec in total

First Response

68 ms

Resources Loaded

4.8 sec

Page Rendered

844 ms

blinddriverchallenge.org screenshot

About Website

Visit blinddriverchallenge.org now to see the best up-to-date Blind Driver Challenge content and also check out these interesting facts you probably never knew about blinddriverchallenge.org

The National Federation of the Blind (NFB) Blind Driver Challenge™ is one of our most innovative and far-reaching research initiatives.

Visit blinddriverchallenge.org

Key Findings

We analyzed Blinddriverchallenge.org page load time and found that the first response time was 68 ms and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

blinddriverchallenge.org performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

12/100

10%

LCP (Largest Contentful Paint)

Value6.3 s

11/100

25%

SI (Speed Index)

Value15.7 s

0/100

10%

TBT (Total Blocking Time)

Value3,260 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value17.4 s

4/100

10%

Network Requests Diagram

blinddriverchallenge.org

68 ms

blinddriverchallenge.org

88 ms

blind-driver-challenge

87 ms

blind-driver-challenge

1578 ms

js

176 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Blinddriverchallenge.org, 41% (16 requests) were made to Nfb.org and 18% (7 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Stats.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 497.9 kB (42%)

Content Size

1.2 MB

After Optimization

676.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Blinddriverchallenge.org main page is 1.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 512.6 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 157.5 kB

  • Original 181.8 kB
  • After minification 151.1 kB
  • After compression 24.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 30.7 kB, which is 17% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 157.5 kB or 87% of the original size.

Image Optimization

-1%

Potential reduce by 4.2 kB

  • Original 512.6 kB
  • After minification 508.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Blind Driver Challenge images are well optimized though.

JavaScript Optimization

-24%

Potential reduce by 24.4 kB

  • Original 103.4 kB
  • After minification 103.4 kB
  • After compression 79.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 24.4 kB or 24% of the original size.

CSS Optimization

-83%

Potential reduce by 311.8 kB

  • Original 376.7 kB
  • After minification 376.5 kB
  • After compression 64.9 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Blinddriverchallenge.org needs all CSS files to be minified and compressed as it can save up to 311.8 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (50%)

Requests Now

28

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blind Driver Challenge. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

blinddriverchallenge.org

blinddriverchallenge.org

68 ms

blinddriverchallenge.org

blinddriverchallenge.org

88 ms

blind-driver-challenge

blind-driver-challenge

87 ms

blind-driver-challenge

blind-driver-challenge

1578 ms

js

js

176 ms

css_Gg9IYAWxDrgNmsMGOb3ziqQ9MdlMtJRh3bHZs7xdxwc.css

css_Gg9IYAWxDrgNmsMGOb3ziqQ9MdlMtJRh3bHZs7xdxwc.css

139 ms

css_x25cxJVxzDu5b3WmcYOmxj4p_ErnKUyPcql1gNJCG6M.css

css_x25cxJVxzDu5b3WmcYOmxj4p_ErnKUyPcql1gNJCG6M.css

83 ms

css

css

218 ms

S4WRQMc0ryY

S4WRQMc0ryY

428 ms

logo-nfb-slogan.png

logo-nfb-slogan.png

127 ms

Cruise.png

Cruise.png

346 ms

2020-AutosInnovateLogoRBG-002.png

2020-AutosInnovateLogoRBG-002.png

346 ms

cTHa_5Y5IA4

cTHa_5Y5IA4

417 ms

email-decode.min.js

email-decode.min.js

112 ms

jquery.min.js

jquery.min.js

320 ms

js_k8X44N4-_wC_0jU1A9tcUvLgTuA6ooqhjpPCHC8-elM.js

js_k8X44N4-_wC_0jU1A9tcUvLgTuA6ooqhjpPCHC8-elM.js

198 ms

logo-nfb.png

logo-nfb.png

318 ms

aC-seal-horizontal-w-url.png

aC-seal-horizontal-w-url.png

318 ms

CW_TopRated_RGB_WEB_80px.png

CW_TopRated_RGB_WEB_80px.png

316 ms

analytics.js

analytics.js

310 ms

S6uyw4BMUTPHjx4wWw.ttf

S6uyw4BMUTPHjx4wWw.ttf

323 ms

S6u9w4BMUTPHh6UVSwiPHA.ttf

S6u9w4BMUTPHh6UVSwiPHA.ttf

326 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

177 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

192 ms

S6u8w4BMUTPHjxsAXC-v.ttf

S6u8w4BMUTPHjxsAXC-v.ttf

237 ms

www-player.css

www-player.css

236 ms

www-embed-player.js

www-embed-player.js

233 ms

base.js

base.js

339 ms

fetch-polyfill.js

fetch-polyfill.js

186 ms

invisible.js

invisible.js

106 ms

collect

collect

68 ms

collect

collect

1876 ms

7549702e7afd5c53

7549702e7afd5c53

474 ms

ad_status.js

ad_status.js

379 ms

RyHSygdhfD3dME44-3NNtjQCjkAA9PJK5Mnnq9vnCgY.js

RyHSygdhfD3dME44-3NNtjQCjkAA9PJK5Mnnq9vnCgY.js

310 ms

embed.js

embed.js

126 ms

id

id

122 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

34 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

35 ms

Accessibility Review

blinddriverchallenge.org accessibility score

92

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Best Practices

blinddriverchallenge.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

blinddriverchallenge.org SEO score

89

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blinddriverchallenge.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Blinddriverchallenge.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

blinddriverchallenge.org

Open Graph description is not detected on the main page of Blind Driver Challenge. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: