Weather Characteristics of extended periods with no Fatal Crashes	Weather Characteristics of extended periods with Fatal Crashes
Cold fronts and low-pressure systems bypassing Victoria to either the north or south.	Numerous sequences of cold fronts and troughs passing directly through Victoria.
Cold fronts and low-pressure systems passing through on the weekend (particularly on a Sunday) and/or arriving overnight after the peak period and clearing before the morning peak.	Cold fronts passing through during times of peak travel demand.
Adverse or extreme weather which avoided areas of high activity, and was concentrated in the remote parts of the state (e.g., northeast of Victoria).	Adverse or extreme weather which hits areas of high activity centred on urban centres or areas of high travel demand.
Stable weather and light wind conditions.	Variable weather, storms and strong winds and peak gusts.
Consistent sequence of weather, either good or bad – for example warm and sunny or cold, cloudy, and wet. This included: Above average daytime temperatures in autumn, winter and spring and warmer night-time temperatures; Cooler than average summer days with warmer than average summer nights (lower delta T, the difference between daytime and night-time temperature), resulting in less overnight pavement dampness; or Warmer nights in general.	Highly variable and/or oscillating weather conditions, often between the extremes of heatwaves and cold weather unusual for the time of year. This can include: Extreme heat waves in summer, Sunny days followed by cold, dewy and/or frosty nights, and Sudden cold snaps. Cold nights with clear skies following a sunny day result in a large delta T (difference between daytime and night-time temperature). Delta T can influence how wet the pavement is. The magnitude of delta T’s influence varies between summer and winter.
Windy conditions after rain can result in rapid drying of the road and therefore less damp pavement.	Still air combined with damp conditions, and air that is unable to hold moisture (low vapour pressure measured in hPa) combined with the lack of sunshine (thick/high cloud cover). Under these conditions, road pavements remain damp for considerable periods and visibility is low.
Some cloud cover or moisture in the atmosphere can reduce the sun glare significantly.	Extremes (very high or very low) in solar radiation as the result of either absence of cloud cover to very thick cloud cover. The absence of cloud or moisture held in the atmosphere can result in bright sunshine, making driving conditions glary and sometimes blinding.
Short-lived light rain events with rapid evaporation.	Significant periods and duration of widespread scattered and/or heavy rain.
	The 2009 14-day sequence had Tropical Cyclone Laurence in the north of Australia that brought a very unusual weather sequence to Victoria.