Services Traffic Signal Plus has over 25 years of experiences in numerous projects completed throughout Virginia and other parts of the region including Ohio, Florida, Maryland, New York, Maine and the District of Columbia. Traffic Signals Plus provides traffic engineering design services as well as planning and studies. The company also offers services in the areas of traffic signal design, lighting design, maintenance of traffic, work zone safety, traffic simulation, crash analysis and catalog cut/shop drawing review. Traffic Signals Plus is certified as a DBE by the Virginia Department of Minority Enterprise.