Which of the following is an offense under the Road Transport Act 2013 section 112?

Driving under the influence is indeed an offense under the Road Transport Act 2013 section 112. This section addresses the unacceptable risks posed by individuals operating a vehicle while impaired by alcohol, drugs, or other substances that affect their ability to drive safely. The law aims to enhance road safety by imposing strict penalties for driving under the influence, reflecting the serious nature of the offense.

In contrast, while prescribed concentration of alcohol is also related to drunk driving, it specifically deals with the legal blood alcohol concentration (BAC) limits, and thus falls under a different regulatory framework that might address specific limit violations rather than the broader offense of driving under influence. Non-compliance with vehicle specifications pertains to vehicle standards and safety issues, which, while serious, do not relate to the impairment of a driver’s ability to safely operate the vehicle. Lastly, traffic sign violations concern adherence to traffic control measures but do not intrinsically relate to the driver's physical or mental state. Therefore, the focus on driving under the influence encompasses a critical violation that the law seeks to prevent for the safety of all road users.