The federal government said Friday that it is suing Uber for allegedly discriminating against passengers with disabilities.

The Department of Justice said Uber drivers routinely refuse to serve individuals with disabilities, including those with service dogs. Uber is the largest ride-hailing company in the U.S.

The lawsuit alleges that Uber drivers have charged illegal cleaning fees for service animal shedding and imposed cancellation fees after denying service. The lawsuit also alleges that drivers have refused to allow disabled individuals to sit in the front seat so they can use the back seat for mobility devices.

Disabled individuals have missed appointments, experienced significant delays and have been stranded in inclement weather, the lawsuit said.

“For too long, blind riders have suffered repeated ride denials by Uber because they are traveling with a service dog,” said Assistant Attorney General Harmeet Dhillon of the Justice Department’s Civil Rights Division. “This lawsuit seeks to end this persistent discrimination and allow riders with disabilities to use Uber.”