W3C Web Content Accessibility Guidelines (WCAG) 2.0 ...

When edge line markings shall/should/may be used (warrants) Section 3I.05 Lane and Pavement Width Reduction Markings. Section 3I.06 Use of RPMs to Supplement Longitudinal Markings. ... Explain when it is appropriate to use line extensions for turn or through lanes at an intersection. ................
................