Can you be convicted of DUI at a lower BAC than 0.8 under certain conditions?

Yes, you can be convicted of DUI at a lower blood alcohol concentration (BAC) than 0.08 under certain conditions. In Pennsylvania, the law stipulates that a driver can face DUI charges with a BAC lower than 0.08 if they exhibit signs of impairment while operating a vehicle. This means that even if a person's BAC is under the legal limit, if they show erratic behavior, slurred speech, or any other indicators of impairing effects from alcohol or drugs, they can still be found guilty of DUI.

Additionally, for certain categories of drivers, such as those who are underage (less than 21 years old) or those with a Commercial Driver's License (CDL), the threshold for BAC can be even lower, making it possible to be charged with DUI at BAC levels of 0.02 or 0.04, respectively. This further underscores the fact that impairment is a key factor in DUI convictions, rather than just the numerical BAC reading itself.