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Interlock Device: Everything You Need to Know

13 March, 2024

A prohibition sign over a person opening a beer bottle

An interlock device is a common requirement for people with a history of drink driving. It is equipment attached to the ignition system of a vehicle that requires a breath sample. For the vehicle to start, the driver must pass a breath alcohol test. Therefore, it is a crucial tool to prevent individuals from dangerous driving. However, there are several factors to be aware of. For instance, successive failed breath tests will cause a temporary lockout of the vehicle.

Driving Under the Influence of alcohol (DUI) is a serious offence with severe penalties. One of these punishments is the alcohol interlock condition. This measure is to help minimise repeat offences. Thus, these devices have been strictly enforced to prevent road accidents and other hazards. This article will provide a comprehensive guide about alcohol interlock units, including their purpose, how they work, and the legalities surrounding them.

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What Is an Interlock Device?

An interlock device, also known as an alcohol ignition interlock, is a type of breathalyser installed in a vehicle. It prevents drivers from operating the vehicle if they have been drinking alcohol. This device requires the individual to blow into it before starting the car. If the Blood Alcohol Concentration(BAC) exceeds the preset limit, the vehicle will not start.

Installing these units is often required by law for individuals convicted of Driving While Intoxicated (DWI). The court mandates the interlock program, especially for people with repeat offences or first-time offenders with high range Prescribed Alcohol Content (PCA). Moreover, program participants should complete the court-ordered interlock period without additional violations.

Accordingly, the person must apply to have the device installed by an authorised interlock provider and shoulder all the expenses. The service provider ensures that the unit meets ignition interlock requirements and complies with state-specific regulations. In addition, the device is typically mounted on the dashboard or near the steering wheel, making it easily accessible to the driver.

A Brief History

  • The interlock programs were first introduced in Australia in the early 2000s to combat drunk driving.
  • In 2003, New South Wales became the first state to make interlock conditions for certain drink driving offenders.
  • In 2014, the Australian government launched a national interlock scheme to address the issue of drink driving and promote road safety.
  • A national evaluation of the alcohol interlock program in 2017 showed positive results in reducing DUI offences.
  • Advancements in technology led to more sophisticated interlock systems, such as GPS and photo verification functionalities.
  • Private individuals or companies may choose to purchase the device for safety purposes.

A person stopping another individual attempting to drive with an alcoholic beverage in hand

Purpose of Interlock Devices

The main objective of interlock devices is to protect the public from the dangers of drink driving. It serves as a safety measure to prevent individuals from operating a vehicle while intoxicated. Therefore, it plays a crucial role in reducing the number of alcohol-related accidents and keeping the driver and others on the road safe.

Another purpose is rehabilitation. Rather than facing a lengthy license suspension, offenders can continue to drive under the alcohol interlock program. Hence, it allows them to maintain their daily routine, such as going to work or attending appointments, while ensuring they do not pose road safety hazards. Also, requiring a breath analysis before driving deters excessive consumption. It aims to break any risky habits, such as combining drinking and driving.

Furthermore, it can serve as a monitoring tool for law enforcement and court officials. The machine can record any failed attempts or violations, providing valuable data on the compliance or effectiveness of the program. Consequently, this can reduce recidivism rates and improve public safety.

Importance in Maintaining Safe Roads

Safe roads mean fewer accidents, injuries, and fatalities. One of the factors that can pose road hazards is impaired or intoxicated driving. Therefore, law enforcement agencies and policymakers have implemented charges for dangerous driving offences. The penalties include fines, driving disqualification, imprisonment and alcohol interlock schemes.

Police officers routinely conduct roadside screening to determine if individuals are driving with alcohol in their system. This measure helps promote responsible driving. Individuals also take precautionary measures to avoid legal charges by using portable breathalysers to monitor their alcohol intake. Such devices can help ensure their BAC is not over the legal limit before driving.

A man holding an open bottle of liquor while driving

How Interlock Devices Work

An interlock device works similarly to a handheld breathalyser. It requires the driver to provide a breath specimen by blowing into the mouthpiece before starting the car. The device analyses the sample through its sensors to measure the BAC. Most states have a zero alcohol limit for program participants. Therefore, any amount of alcohol in the system will prevent the engine from starting.

The sensors undergo an electrochemical reaction process when they come into contact with alcohol molecules. This process produces small electrical currents that are proportional to the amount of alcohol in the breath. Subsequently, the interlock software converts these currents into a BAC reading.

If the BAC is zero, the device allows the ignition system to start. The interlock also has a rolling retest function, wherein it requires the individual to provide additional breath samples while driving. This helps ensure that the driver remains sober during the entire journey. If the driver fails a rolling retest or does not provide a specimen within the time frame, the device will log the event and may trigger an alarm.

Ignition Locking Mechanism

The ignition locking mechanism is the mechanical part wired to the ignition system of a vehicle. It interrupts the signal from the ignition to the starter until the person provides a valid breath sample. If alcohol is present in the breath, the locking mechanism will prevent the car from starting.

Moreover, successive failed breath tests may result in temporary lockouts. This ensures that individuals cannot bypass the system by having someone else provide a clean breath specimen for them. To allow driving again, they must purchase a lockout code from the interlock service provider and input it into the device to unlock the ignition.

A gavel near a book and a scale of justice

Legislation and Regulations Regarding Interlock Devices

Legislation and regulations regarding interlock conditions may vary by state. A person with repeat drink driving offences or driving with a BAC of 0.15% and above receives this condition. Generally, DUI convictions require the installation of interlock devices for a 12-month period or longer. This will begin after the driving disqualification period ends.

While under the program, the interlock driver shall not have any alcohol-related driving offences. Failure to comply with the program requirements may result in further penalties, including extended disqualification periods or license suspension. In addition, participants must not operate another motor vehicle other than that nominated to the Registrar.

It is forbidden to have another person provide a breath sample on behalf of the interlock driver. Also, any attempts to remove the device without authorisation are prohibited. Doing so may result in severe penalties, including fines or imprisonment.  Furthermore, individuals must undergo regular servicing of the vehicle, including monthly recalibration or maintenance, to ensure accurate readings. Thus, knowing the relevant legislation is crucial to avoid further legal complications.

Laws Mandating Their Use

The use of alcohol interlock may vary between states and territories. These are some laws mandating their use:

  •  The Mandatory Alcohol Interlock Scheme (MAIS) – A program in South Australia for drivers who have committed serious drink driving offences. Drivers who breach any conditions can face a maximum penalty of $2,500 and further disqualification.
  • The Alcohol Interlock Program in New South Wales – A driver faces a mandatory interlock for having more than one drink driving offence.
  • The Alcohol Interlock Program in Queensland – A program for high-risk drivers with a BAC of 0.10% or more or two or more offences within five years.

A police officer conducting a sobriety test

Criteria for Mandatory Installation of Interlock Devices

The requirement for mandatory installation of interlock devices depends on several criteria. In general, individuals with multiple drink driving offences on their record are required to install the device in their vehicle. A court may order the mandatory installation of the device as part of a sentencing condition for a DUI conviction, regardless of their BAC levels.

Additionally, it involves individuals with a BAC level of 0.15% and higher at the time of the police breathalyser test. This applies to both repeat and first-time offenders. These alcohol concentration levels typically cause significant impairment and pose a greater risk of causing accidents. Requiring these individuals to install an alcohol interlock can help prevent them from getting behind the wheel while under the influence.

Another criterion is refusing to provide a breath or blood sample for alcohol testing. This refusal is a serious offence, and police officers can impose penalties similar to drink driving charges. Lastly, individuals may get a mandatory installation if their driving with alcohol resulted in injuries or fatalities.

Penalties for Violating the Requirements

Violating the requirements of the interlock program can result in severe penalties. Individuals who fail to comply with the regulations may face extended interlock participation periods and fines. Contravention of the law can have a maximum penalty of $2,500. Similarly, assisting the holder of an interlock license may have a penalty of $2,500.

One common violation is attempting to operate a motor vehicle other than the one nominated to the Registrar. Doing so may result in immediate disqualification and further penalties. Moreover, providing false information to the authorities or tampering with the device can lead to fines or imprisonment.

Two police officers investigating a car crash

Alcohol Interlock Device for High-Risk Offences

High-risk drink driving refers to instances where a driver is operating a motor vehicle with a BAC of 0.15% or higher. If a person registers this BAC level at the time of the roadside breath test, they may face automatic penalties. One of these charges is the installation of the alcohol interlock device.

Police officers also request the driver to undergo evidential testing at a nearby police station. The results of this test are admissible in court as evidence in a DUI case. This may lead to a conviction involving the application of alcohol interlock from an accredited provider. Furthermore, offenders can face up to nine months in prison and pay a fine of up to $3,300 for the first offence.

Subsequent offences may result in more severe penalties, including a 12-month license suspension and longer terms of imprisonment. In addition, individuals may also attend a mandatory alcohol education program to help reduce the risk of alcohol abuse and hazardous driving. People charged with DUI may seek help from drink driving lawyers to help navigate the legal system.

Disqualifications

Disqualification from driving may occur if a person is guilty of drink driving. The minimum period may range from six months to several years, depending on the severity of the offence. In some cases, individuals must consult with a medical specialist or complete a rehabilitation program before being eligible to get their license back.

The disqualification period aims to deter individuals from engaging in risky behaviours and protect the safety of other road users. Reinstatement of a driver’s license is contingent on meeting all requirements set by the court and demonstrating a commitment to safe driving practices.

A man drinking an alcoholic beverage from a bottle while driving

Alcohol Interlock Device FAQs: How Long Do You Need It Installed?

One common question that individuals facing a drink driving charge may have is how long they need to drive with an alcohol interlock device. The duration of the requirement varies depending on the severity of the offence and whether it is a first-time or repeat offence. Generally, the alcohol interlock program in Australia has a minimum period of six months.

Repeat offenders may have an interlock participation period of 12 to 24 months, depending on how many convictions they have had in the previous ten years. During this period, participants must demonstrate that they have not had alcohol in their breath samples for three months in a row. They must also comply with all program requirements and attend regular servicing appointments.

Failure to meet these conditions may result in an extended period of up to 36 months. When the interlock period ends, they can reapply for their unrestricted license, subject to meeting all other licensing requirements. It is crucial for individuals to fully understand the obligations of the interlock program to avoid further penalties.

Medical Exemptions

  • Interlock exemptions may be granted for individuals with medical conditions preventing them from providing a sufficient sample of breath.
  • The applicant must be able to provide evidence, such as a report from a medical practitioner, that they cannot use an electronic breath testing device.
  • If a person applies for a medical exemption, the agency will also conduct a medical assessment on the ability to drive safely.
  • Individuals must complete the application form for interlock exemption and submit it to the relevant authority for consideration.
  • If approved, the person may be exempted from the interlock requirement and given an alternative arrangement to ensure road safety.

A man stopping another person from taking his keys after drinking

Alcohol Interlock Device Programs

Alcohol interlock device programs are safety measures to keep the roads safer from the hazards of impaired driving. It also aims to reduce recidivism in habitual or high-risk offenders. One of the main benefits of this program is reducing alcohol-related driving incidents. There is a significant decrease in repeat offences for drivers with a previous record.

As a measure to reduce circumvention of the device, random retests are necessary while the vehicle is running. Other components of the program include information seminars and downloading data from the unit, which logs all test attempts, passes, warnings, and failures. Additionally, regular servicing and calibration of the device are mandatory to ensure its accuracy and effectiveness.

However, there are challenges and limitations to the program. Some critics argue that interlock ignition devices can be expensive. Participating in this program can be challenging for individuals with financial hardship. Moreover, there may be some practical problems with the device, such as an abort tamper or something that blocks the flow of air in the breathalyser.

How to Get One

Individuals with repeat offences are subject to complete the interlock program. The court may also assess the level of risk of the driver and determine if they need to participate in the program. Once ordered by the court, individuals must contact an approved service provider to install the device and complete all necessary paperwork.

Participants can only exit the program when they have completed the minimum participation period and alcohol assessment and treatment. They must also demonstrate the separation from drinking and driving for a continuous period of 180 days. Also, individuals shall not have any breaches during this period.

A man holding a beer bottle while driving

Private Alcohol Interlock Devices

Alcohol interlock devices are also available for private use. This means that individuals may choose to install the machine voluntarily. However, they do not have the restrictions of those under an interlock license. Some companies may use it for jobs involving driving heavy vehicles or dangerous goods as a proactive measure. It may also be necessary for those under rehabilitation treatment.

When purchasing a device, individuals may choose between a state-approved service provider or an off-the-shelf model. Furthermore, private interlocks operate in a similar manner to court-ordered devices, requiring a breath analysis before starting the vehicle. However, the preset limit can be different. Instead of zero BAC, they can modify the limit to a certain level, such as 0.02% to 0.05%.

Individuals or companies may choose a service provider based on several factors. One of the important considerations is location. A service centre close to the home or workplace can be advantageous. Another factor is the features. Devices with GPS tracking or camera options can be beneficial in certain scenarios. Lastly, the cost of the lease significantly affects the budget.

How Much Does It Cost?

The estimated cost of interlock installation can reach up to $2,200 to $2,500 per year. This includes the installation fee, monthly device leasing, regular servicing, and device removal at the end of the program. The cost may vary between interlock suppliers and other administration fees.

Initial purchase and setup can cost between $100-500. Monthly fees can range from $50-150, depending on the vehicle type. It is also important to note that additional fees may apply, such as lockout fees, damage repair charges, and cancelled/missed appointment fees. To get a specific price range, alcohol interlock suppliers offer free inspection and quotations.

A person handing the key to their car

>Getting an Alcohol Interlock Device Installed

The first step to getting an alcohol interlock device is to choose from a list of accredited service providers in the area. Individuals may first pay the necessary fees and complete the required forms. Then, they should schedule an appointment with the chosen provider for installation. On the scheduled date, they must bring the nominated vehicle for registration.

During installation, the provider will fit the interlock into the vehicle and explain how it works. They will also provide training on how to properly use the device. Afterwards, individuals must follow all guidelines and requirements of the provider and program. Regular servicing appointments are necessary to ensure that the device is functioning properly.

Only a licensed technician can install the alcohol interlock into the vehicle. Any tampering may trigger an alarm, service call, or permanent lockout. Additionally, only the participant can operate the vehicle with an interlock. Following the proper breath test procedures can ensure accurate results and avoid any legal complications. Finally, upon completion of the program, the provider will remove the device from the vehicle.

Summary of the Steps

  • Individuals should undergo a medical consultation before enrolling in the program.
  • Research and choose an accredited alcohol interlock service provider.
  • Pay the necessary fees, complete the required forms, and present other documents, such as driver’s license and proof of car insurance.
  • Schedule an appointment for installation.
  • Bring the vehicle to the service centre on the scheduled date.
  • Have a licensed technician install the device and provide training on how to use it.
  • Medical consultation may also be required during the interlock period, as well as a medical assessment nearing completion of the program.
  • After the installation, follow the guidelines on how to use the device.

Conclusion

Interlock devices play a crucial role in promoting road safety and reducing instances of accidents and fatalities. These devices fit in the ignition system of the vehicle and require a clear breath sample to start the car. This helps prevent individuals from driving if they are under the influence of alcohol. Moreover, these devices are often mandated for individuals with DUI convictions. During this period, individuals must abide by the regulations and avoid similar offences.

Any further violations regarding drink driving or misuse of the interlock can result in extended disqualification periods. To get the device, they must apply to a service provider and pay the initial fees. On the other hand, private individuals and companies may also choose to use an alcohol interlock voluntarily. Overall, the alcohol interlock program aims to deter risky behaviours, such as excessive drinking, and promote responsible driving.

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