This app is specially designed for District of Columbia driving knowledge test. "DMVCool" is a series of driver license practice test apps that help you to prepare the driver's license test. By using this App, you can practice with hundreds of questions including traffic signs and driving knowledge. Main features: 1. Learn traffic signs and practice with questions 2. Learn driving knowledge and practice with questions 3. Unlimited sign quiz, knowledge quiz and mock test 4. Search signs and questions 5. Analysis of wrong answered questions and find your weak spots Good luck to your DC's driver license test!