Plane landing Disability advocates are suing the U.S. Department of Transportation in an effort to force the agency into issuing rules on restroom accessibility in flight. (Anthony Souffle/Chicago Tribune/TNS)

Paralyzed Veterans of America filed a lawsuit against the U.S. Department of Transportation for delaying the release of rules focused on adding wheelchair accessible restrooms to single aisle planes. The veterans group stated that, without accessible restrooms on domestic flights, individuals with disabilities are left uncomfortable and often have to resort to dehydration to travel long distances.