Since 2012, drivers who blow over .08 have their vehicles impounded for three days and lose their licences until their cases are resolved in court.
The process can take months.
A group of motorists who faced impaired driving charges had argued the law violates the Charter of Rights because it presumes guilt and violates people's rights by suspending their licences indefinitely.
Justice Thomas Wakeling, however, ruled people don't have a constitutional right to drive.
He also praised the law, saying it has probably saved lives and will continue to do so.