Vista Visual Group. sign system provides the most flexibility to your creative design while at the same time meeting or exceeding ADA's (Americans with Disabilities Act) legal requirements. This unique sign system meets virtually every in-field parameter from simple retrofit of an existing sign to a totally new signage program for facility identification, whether it be interior or exterior, private business or health care institution. Graphics are custom engineered with polymers and acrylic or aluminum lamination for durability. ADA graphics can be applied to almost any signage substrate.