The Floridian law prohibits you from increasing the speed of the vehicles until the vehicles that is passing by you have a completed its maneuver and is far away for the and in a zone of visibility and this was done as to keep the protection of the citizens firm the traffic and the road rage incidences.
Because it does not directly affect the landform thus why it's considered as a passive agent. Those that do directly affect landforms are tectonic activities, winds, and water flow. Weather only onsets the formations.