Which of the following is a common type of field sobriety test?

The horizontal gaze nystagmus test is a common type of field sobriety test used by law enforcement to assess whether a driver is impaired due to alcohol. This test indicates how well a person's eyes can track a moving object, specifically looking for involuntary movements in the eyes known as nystagmus. As the officer moves a stimulus, like a pen or finger, horizontally in front of the person’s eyes, they are observing if the eyes can smoothly follow the object. If the eyes exhibit signs of nystagmus at certain angles, it may suggest impairment.

Field sobriety tests are designed to provide law enforcement with observable behaviors that may indicate a driver's impairment, and while the breathalyzer test measures blood alcohol content, it is not a field sobriety test per se but rather a chemical test. The blood pressure test and vehicle inspection do not assess impairment and are thus unrelated to determining whether a driver is under the influence.