You&#x27;re confusing two different moving violations here: exceeding posted speed limit and failure to keep right. (AKA impeding traffic; the exact term varies from state to state. Also, I&#x27;m assuming American traffic law here.)<p>If the speed limit is 65, the flow of traffic is at 80, and you drive 65 in the left lane - you are failing to keep as far right as practicable, because you&#x27;re moving slower than the flow of traffic in other than the rightmost lane.<p>If you&#x27;re going 80, you are still speeding, but you&#x27;re not failing to keep right. Yes, it&#x27;s unlikely you&#x27;ll be pulled over, but you are committing a moving violation nonetheless.<p>If you&#x27;re going 65 and you&#x27;re in the rightmost lane, there is no violation even though you&#x27;re travelling slower than the flow of traffic. Posted speed limits are still do-not-exceed values; the requirement to keep as far right as practicable is a completely separate issue.