Employees at Days Inn, Super 8 and Ramada hotels are being trained on how to spot sex traffickers.

Many traffickers exploit their victims in hotel rooms, said Nicole Levine at Polaris, an advocacy group that will help train Wyndham workers.

Hotel workers will be trained to notice suspicious situations, like guests who stay for long periods of time without many possessions. They're taught when it's appropriate to call the the National Human Trafficking Resource Center hotline or alert local police.

READ MORE: http://money.cnn.com/2014/11/18/news/companies/days-inn-sex-trafficking/