Drunk driving prevention system with bypass mode and drunk driving prevention method using the system

A system for bypassing a drunk driving prevention function of a vehicle, comprising:

• a sensor module configured to measure, during breath-checking a driver of a vehicle, alcohol content in the driver's exhaled breath;
• and
• a control module configured to (1) check, during the breath-checking of the driver, whether the driver is intoxicated based on the alcohol content measured by the sensor module, (2) determine whether or not the breath-checking of the driver is completed based on whether checking the driver is intoxicated has been completed, and (3) block starting of an engine of the vehicle when the driver fails the breath-checking,
• wherein the control module includes a bypass control unit configured to (1) receive, from the driver, a request to allow the driver to drive the vehicle after the driver fails the breath-checking, and (2) in response to receiving the request from the driver, causing the vehicle to enter a bypass mode in which the driver is allowed to drive the vehicle, and
• wherein the bypass control unit is further configured to (1) compare the measured alcohol content with bypass reference alcohol content after the vehicle enters the bypass mode, and (2) deactivate the bypass mode when the measured alcohol content exceeds the bypass reference alcohol content.