Complex sentence: HOV lanes are typically on the left and conflict with the basic concept of keep right except to pass-many drivers do not understand, if they aren't traveling faster than the traffic to their right, they are in the wrong lane.
Split into simpler sentences: HOV lanes are typically on the left and conflict with the basic concept of keep right except to pass. Today many drivers do not even understand, if they aren't traveling faster than the traffic to their right, they are in the wrong lane.