"This would create a barrier to using a vehicle to safely drive home after drinking. Enabling people to use an automated vehicle to drive them home despite having consumed alcohol has the potential to improve road safety outcomes by reducing the incidence of drink-driving," the NTC said in a discussion paper released earlier this week. "Legislative amendments could be made to exempt people who set a vehicle with high or full automation in motion from the drink- and drug-driving provisions." The NTC does acknowledge a risk that could involve a person under the influence of drink or drugs choosing to take over the car. If that occurred, the body suggests that drink and drug driving offences would apply. But ultimately, a drunk person in a driverless car is similar to them being in a taxi, the NTC concludes. "The application of an exemption is clear-cut for dedicated automated vehicles, which are not designed for a human driver. The occupants will always be passengers. The situation is analogous to a person instructing a taxi driver where to go," the paper said. In many countries car parking lot barriers drugs are illegal and drink-driving laws differ between jurisdictions. Australia has been pushing forward legislation to facilitate driverless cars over the past two years. In 2015, the first public self-driving car trials took place in South Australia, after laws were passed there to allow tests.