This is a very good question since this goes against everything U.S. Citizens know about innocent until proven guilty. You have been deprived of you right to drive before you have even stepped into a court room. These arguments have been unsuccessfully raised many times. Many of the aspects of drunk driving cases presume guilt. Note that the court has not suspended your license but rather the Ohio Bureau of Motor Vehicles (OBMV). The reasoning is your license is a privilege with conditions. One condition is that you will submit to a chemical test to determine your blood alcohol concentration (BAC) when asked by a law enforcement officer. Another condition is that if you do submit to a test your BAC will be under the legal limit which is .08. If either of these conditions are breached, your license is automatically suspended. The suspension if for 90 days in the case of a test above .08 and 1 year for a refusal.