"The two companies [Uber and Lyft] are named as defendants in a smattering of lawsuits from California to Texas alleging they violated the Americans with Disabilities Act by failing to make their cars handicapped accessible. In some courts, Uber and Lyft are even named as co-defendants in a single case - putting the rivals, awkwardly, in the same boat." - Jen Wieczner, "Why the disabled are suing Uber and Lyft," in Fortune, May 22, 2015. Here is the article.
In essence, drivers, who are contract workers, for Uber and Lyft are being accused of discriminating against the disabled. They tend not to give the rides, contend the plaintiffs. And when they do, they are not accommodating about assisting them in and out of the vehicle and making provisions for their wheelchairs and service dogs.
Anyone who has ridden public transportation which is handicapped accessible understands how the process requires special equipment. It is also time-consuming. Drivers hired as freelancers by the ride-sharing services frequently don't have that equipment and will not be reimbursed directly for the time invested. If they are bypassing those kinds of requests for rides or showing impatience when they do that might be framed as the brute realities of capitalism.
The solution might be for Uber and Lyft to provide special vehicles with specially trained drivers that can provide safe, courteous service to the disabled.