What does the countdown technique require the driver to do?

The countdown technique specifically involves the individual counting out loud 15 or more numbers in reverse sequence. This method is designed to assess the driver’s cognitive functioning, attention, and ability to follow complex instructions, all of which can be affected by alcohol or other impairments.

To perform this task, the driver must not only recall numbers in reverse order but also articulate them clearly and accurately, demonstrating both mental processing and verbal communication skills. The reverse counting adds an additional layer of difficulty, making it a more effective measure of impairment compared to simpler counting tasks.

Effective field sobriety tests often rely on cognitive tasks that enhance the evaluator's ability to assess impairment. This technique is an advanced method used to gain insight into a driver's overall level of intoxication or impairment by challenging them with a task that is more demanding than basic counting or silent tasks.