Final answer:
Driving ability can be impaired with as little as one drink. The legal limit for intoxication is a BAC of 0.08%, and a Breathalyzer can measure the concentration of alcohol in the breath. Even at lower BAC levels, impairment to driving skills can occur.
Step-by-step explanation:
Driving ability is affected by various levels of alcohol consumption, starting with even one drink. The immediate effects on a person's driving ability are influenced by their blood alcohol concentration (BAC). In the United States, a BAC of 0.08% or above is legally considered intoxication, and driving at or above this level is illegal.
The Breathalyzer is a device that measures a person's BAC, and even at lower levels of BAC, such as 0.025-0.080%, significant impairment can occur. Alcohol affects coordination, judgment, and reaction times, making driving unsafe even with a small amount of alcohol in the system. It is important for individuals to recognize that their driving ability can be affected long before they reach a BAC of 0.10% or higher.