Pennsylvania driving lesson · Occupant Safety and Other Laws
Carbon monoxide and testing accommodations
A 3-minute lesson from the Pennsylvania course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Carbon monoxide from your exhaust can poison you without warning because you can't smell it. The handbook also explains the help PennDOT offers people who need an interpreter or an oral test.
Know the rule
All gas-powered vehicles produce carbon monoxide, a deadly odorless gas released from the exhaust pipe. If you become drowsy or nauseous, it could be carbon monoxide poisoning.
All Driver License and Photo License Centers are accessible. PennDOT provides a sign language interpreter on request for the Knowledge Test, Road Test or special point exam; contact PennDOT at least two weeks ahead, give the center and at least three dates.
You're idling in a traffic jam on a cold day with the windows up and start feeling dizzy and sick to your stomach. Crack a window right away; if it doesn't pass, get out into fresh air and seek medical help.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
Which warning signs could mean carbon monoxide poisoning while driving?
A strong smell of exhaust
Sneezing and itchy eyes
Drowsiness or nausea
Blurry vision from glare
Answer: Drowsiness or nausea
Carbon monoxide is odorless; becoming drowsy or nauseous could indicate carbon monoxide poisoning.