What are six factors that can affect driving on multiple lane expressways?

Six factors that can affect driving on multiple lane expressways include traffic density, weather conditions, road surface quality, vehicle types (e.g., trucks vs. passenger cars), driver behavior (such as aggression or distraction), and signage or road markings. High traffic density can lead to congestion, while adverse weather like rain or snow can reduce visibility and traction. Poor road surfaces can create hazards, and the presence of larger vehicles may require more caution. Additionally, driver behavior can significantly impact safety and flow on expressways.