Reserved parking spaces aren’t a novel idea. Every parking lot provides handicap spaces, and others provide spaces specifically for new and expecting mothers, business clients and the elderly. A nonprofit called Wounded Warrior Family Support is now working to make combat veteran parking a more common sight through the United States.

There are more than 1.8 million Purple Heart recipients living today, many of whom struggle with physical disabilities. To help veterans get prime parking in front of federal, state and municipal buildings, WWFS has distributed 1,000 of combat veteran signs for free. According to the organization, demand for the signs is growing as more business owners seem them in parking lots.

“It’s a tribute to the American people that they want to contribute to recognizing the wounded veterans in our country,” Colonel John D. Folsom of WWFS told IJ.com.

If these parking signs catch on, perhaps military veterans will experience less harassment and judgement when trying to park in handicap areas. Combat veterans often suffer from ‘invisible wounds’ such as PTSD and depression after returning home, but that can cause confusion in the parking lot. For example, last month one military vet received an incendiary letter from someone who believed he did not “look handicapped.” With veteran-reserved spots, the veterans may be able to park in peace.