Abstract
The operation load of alcohol ignition interlock system on driving was measured by various driving scenes. It has been afraid that measuring the expiration while driving might make the driver anxious. Moreover, a change with the lapse of time of an expiration alcoholic density after non-alcoholic food and drink had been taken was measured. As a result, it is necessary to note that the engine might not be able to be started to detect alcohol immediately after drivers take food and drink including alcohol.
