A vehicle immobilization system includes a detection element operable to detect a level of an intoxicant in a user's breath. A control module is operable to receive a signal from the detection element indicating the level of intoxicant in the user's breath, and to selectively restrict operation of a vehicle based on the level of intoxicant in the user's breath exceeding a threshold. A wireless relay is operable to replace a standard relay in the vehicle, and to wirelessly communicate with the control module such that the control module is operable to control the wireless relay to selectively restrict operation of the vehicle.

A vehicle control element measures concentrations of substances in air of vehicle, where the air includes the exhalations and/or body odors or other odors from occupants within the vehicle. A measurement chamber on or in the vehicle control element may include at least one first entry hole through which air can be drawn into the measurement chamber; at least one first exit hole through which air can be discharged from the measurement chamber; a polygonal, elliptical, or circular cross section; reflective inside walls; a laser located at a second entry hole in the measurement chamber, with which laser beams are projected into the measurement chamber through the second entry hole; and a detector located at a second exit hole in the measurement chamber with which laser beams exiting the measurement chamber through the second exit hole are detected. The vehicle control element also includes an interface to an evaluation device.

A gas analysis system for a vehicle includes a measurement chamber that includes at least one sensor configured for measuring substances in exhalations from vehicle occupants and/or the ambient air in a vehicle interior. The gas analysis system may also include at least one fan placed at a discharge opening for the system and designed to convey air through the measurement chamber, at least one filter located at an intake opening in the system and designed to prevent particles from contaminating the system; at least one first check valve, located between the measurement chamber and the fan, and designed to block a return-flow of the air out of the measurement chamber and/or ambient air from the vehicle interior into the measurement chamber, and a control unit, designed to regulate and/or control the conveyance of air through the measurement chamber.

A vehicle control device includes a vehicle controller that, if a predetermined state transition condition is satisfied, makes a state transition of a vehicle from a drive possible state to a drive impossible state. The vehicle control device includes a vehicle occupant detection unit that detects a vehicle occupant in the vehicle. The vehicle controller makes the state transition to the drive impossible state that is different depending on a detection result from the vehicle occupant detection unit.

A method and a system of deploying ignition interlock device functionality. The method comprises receiving data in authentication of a user account associated with the IID; rendering a user interface at the mobile computing device, the user interface including indication of a status of the user account associated with the IID; and receiving a selection of a user action responsive to the status of the user account associated with the IID.

A system for determining a blood alcohol concentration of an individual includes one or more sensors configured to measure a physiological parameter of an individual, and an analysis unit, and a method for monitoring a state of a driver related thereto. A system for determining a blood alcohol concentration of an individual can include one or more sensors, and an analysis unit configured to receive one or more outputs of the one or more sensors. The one or more sensors are configured to measure a physiological parameter of an individual, and the analysis unit is configured to determine a mental state or a physical state of the individual based on the one or more outputs of the one or more sensors.

A method and a system of deploying an ignition interlock device (IID). The method comprises receiving a time series of breath alcohol content (BrAC) measurements that are unitarily sourced from a pre-identified user, each BrAC measurement of the time series including an alveolar breath component and an interferent breath component; estimating a dissipation rate of alcohol attributable to the pre-identified user in accordance with the time series of BrAC measurements; determining, responsive to estimating the dissipation rate of alcohol, at least a subset of the BrAC measurements as being based on the alveolar breath component but not the interferent breath component; and performing one of triggering and not triggering the IID into a lockout state based on the at least a subset of the BrAC measurements.

A device and a method for preventing driving under influence, may include a first measuring device configured for detecting alcohol in indoor air of a vehicle, and a processor connected to the first measuring device, wherein the processor performs a first check of checking a presence or an absence of the alcohol in the indoor air through the first measuring device before a driver boards the vehicle, performs a second check of checking the presence or the absence of the alcohol in the indoor air through the first measuring device after the driver boards the vehicle, and determines whether there is a possibility that the driver is drunken based on the results of performing the first check and the second check.

An alcohol interlock control apparatus for a vehicle includes: a sensor configured to acquire a biosignal of an occupant that is seated in a driver's seat; and a controller configured to determine whether or not the occupant seated in the driver's seat has changed based on the biosignal of the occupant, and when changed, to determine whether the occupant is in a drunken state, and may identify a driver based on the biosignal of the occupant seated in the driver's seat without an additional device and cost, and may fundamentally block an improper alcohol measurement of an additional occupant instead of the driver.

A stop assist device is equipped with an operation switch that is operated to activate and deactivate a hazard lamp of a vehicle. The stop assist device starts stop assist control for stopping the vehicle through automatic deceleration of the vehicle and starts activating the hazard lamp from an abnormality detection timing when it is determined that an abnormality condition that is fulfilled when a driver falls into an abnormal state in which the driver is unable to drive the vehicle is fulfilled. The stop assist device continues to perform stop assist control when the operation switch is operated before the lapse of a predetermined invalid time from the abnormality detection timing during the performance of stop assist control, and ends stop assist control when the operation switch is operated after the lapse of the invalid time from the abnormality detection timing during the performance of stop assist control.