People who drive business cars, trucks, or pool vehicles, and those who manage vehicle dispatch, often face the same question after an accident or a traffic stop. If they drove on company instructions, or for a business purpose such as a customer visit, a delivery, or an emergency call-out, does the standard of liability differ from personal driving? And what changes if the company checked the driver before the trip?
An interlock, or alcohol interlock, is a device that controls vehicle starting based on factors such as the result of a breath test before driving. However, the device's test records and in-house checklists are separate from the legal prohibition on drunk driving. Read by its wording, Article 44 of Korea's Road Traffic Act creates no exception that permits drunk driving, or lifts the driving ban, just because the vehicle is used for business. That said, questions after an accident about the driver, the company that assigned the vehicle, insurance, and so on depend on the specific facts and on other laws and contracts. So the final scope of liability cannot be decided from the words "business use" alone.
The drunk-driving ban does not depend on vehicle ownership or business purpose
Article 44(1) of the Road Traffic Act states that no one may drive a motor vehicle, etc., a tram, or a bicycle while under the influence of alcohol. Here, "motor vehicle, etc." also includes construction machinery within the scope set out in the Act. The provision does not vary the ban according to whether the vehicle is privately or company owned, or whether the trip is a commute or business travel.
Paragraph 4 of the same Article defines the state of intoxication in which driving is banned as a blood alcohol concentration (BAC) of 0.03 percent or higher. Therefore, the fact that a driver was given a business dispatch, that a supervisor asked them to drive, or that a delivery deadline or customer schedule was tight is hard to read as grounds for changing the driving ban standard in Article 44 itself. The business purpose is information to record as the background to how the trip started, not a sign that driving under the influence was approved.
Company checks and police tests are not the same procedure
A company can run pre-departure breath tests or install interlocks. This can be seen as a management measure to reduce in advance the risk of business vehicles being driven under the influence. However, the provisions cited give no basis for treating a pass indication on in-house equipment as a substitute for a test by a police officer or a legal determination.
Article 44(2) states that a police officer may test whether a driver has been drinking by breath test where it is deemed necessary for traffic safety and the prevention of danger, among other cases, and that the driver must comply with the test. A driver who disputes the result may be tested again by a method such as a blood sample, with their consent. This is why, even if you run an in-house check procedure, the legal test procedure and its result must not be reinterpreted as in-house records.
Records show how the trip happened, not a conclusion on liability
In incidents involving business vehicles, it helps establish the facts more to record separately who drove which vehicle and when, who ordered the dispatch, and what checks were done before departure, rather than a single line saying "it was a company car." It is also best not to mix what was directly confirmed with what the driver explained later in the same document.
Especially where an interlock or in-house testing equipment is used, you can consider keeping the test date and time and the person tested linked to the vehicle actually dispatched afterward and whether it was driven. These records can show what preventive procedure the company actually ran, but they are not a certificate that all legal liability of the driver or the company disappears. It is important not to attach a conclusion based only on the equipment supplier or a checklist to issues that need separate review, such as insurance coverage, employer liability, or discipline.
| What to separate | Specific facts you can keep | Purpose of reviewing the records |
|---|---|---|
| Actual driving | Who drove, which vehicle, departure and return times | Confirm that the trip took place |
| Dispatch process | What was requested, who gave the order, any changes or cancellations | Confirm the background of the business trip |
| Pre-departure check | Whether a test was done, test time, whether the trip was put on hold | Confirm that the preventive procedure actually worked |
| Follow-up action | Trip stopped, replacement driver assigned, vehicle recovered | Confirm the facts of the subsequent response |
The reason to separate items as in the table is that one type of record does not automatically prove other facts. For example, a test record shows that a test took place and the result at that time, while a dispatch document shows who assigned the vehicle and for what business. Not overstating what each record means also reduces conflicts between records in later reviews.
Response order in a hypothetical situation
Suppose, for example, that a sales employee is assigned a pool car to visit a client, and the pre-departure test gives a result that does not allow the trip to go ahead. The facts to observe here are the employee's name, the test time and result, the dispatch time for that vehicle, and whether the vehicle actually left. A statement like "the trip was necessary because it was an important client visit" should be written down separately as an explanation of the business situation, and not mixed with the test result itself.
The key to interpretation is whether the vehicle was actually driven after that result and how the company procedure worked. As a possible action, you can set up a way to put that dispatch on hold and immediately inform the person who can decide on assigning a replacement driver or rescheduling the visit. The completion criterion in this example is not the moment a report message is sent, but a state in which the employee did not drive that vehicle and a replacement trip or schedule change has actually been arranged.
There is no need to share the individual's test result widely in this process. It better fits the purpose to give the necessary information only to the people who need it to stop or change the dispatch, and afterward to treat procedural problems that came to light, such as recurring dispatch gaps or a shortage of replacement drivers, as separate targets for improvement.
What "it couldn't be helped for work" cannot replace
Business vehicle operations can involve real pressure, such as delivery times, on-site response, and shift gaps. Even so, that pressure should be treated not as information that creates an exception to the drunk-driving ban, but as an operational question of how to keep work going when someone cannot drive. This is why you set in advance a channel for a person who cannot drive to report a cancelled or changed dispatch, the authority to decide on replacement trips, and a procedure for adjusting vehicle keys or dispatch rights.
In conclusion, it is hard to argue that the drunk-driving standard is relaxed just because a vehicle is used for business. A company's testing and dispatch procedures and interlocks are tools to prevent dangerous driving, not a substitute for legal testing or for liability decisions in individual cases. When an incident occurs, examining the business instruction, the actual driving, the in-house check, and the follow-up action as separate, specific facts is a more accurate starting point than the vague conclusion that "liability is different because it was a company car."
※ This article is general information, not legal advice on any individual case. Please consult a lawyer or other professional about specific matters, and because laws can be amended, check the latest text at the Korea Law Information Center.
