Disney World continues relaxing restrictions at the parks and now single riders lines are returning to for attractions.
The single rider line is designed for solo riders. Cast members will place those riders with other parties to fill in all the space on designated rides.
According to the Walt Disney World website, the single rider is no longer listed under the paused Attractions and Entertainment section of the website, as you can see below:
Disney World has already ended the mask requirement for guest and cast members who are vaccinated and has removed social distancing markers from some queue lines for rides.