Valley Metro has used a contactless card system, the Platinum Pass, since 2011 in a limited capacity; the Platinum Pass is available exclusively through selected public and private-sector employers for distribution to their employees through their human resources (or dedicated ridesharing/transit) departments, with fares at least partially subsidized by the employer as part of the above-mentioned Trip Reduction Program (developed to control the air pollution problem long plaguing the Phoenix area). Any employee contribution to the fare is usually deducted from the employee paycheck. A similar ADA Platinum Pass is also available for qualifying people with disabilities.