The aim of this measure is looking for a reducing trend in the number of serious and fatal injuries due to loss of driver control at night. In the context of this measure "Night" is defined as Crashes where the Light Flag is set to Dark.
Injuries are recorded in the Crash table containing reported crashes and the report groups the data for the last five financial years. Financial years begin July 1. Financial years are considered complete after details of a Crash are imported into the Performance Measures Reporting Tool for the following financial year.
If a crash is located exactly at the boundary of two road sections (end of one and start of the next), it will be allocated to the road section which starts where the crash is located.
The comparative trend graph expresses the loss of driver control at night trend as a percentage of the average crash rate for the previous five financial years, ignoring the current incomplete year. This creates a trend value that is based on the change in crash rate relative to the size of the network (average crash rate). We use this figure to allow comparison between large and small networks. This trend is shown calculated for your network, Peer Group , Region and the Nation . Negative values, shown in green, indicating a decreasing or improving trend. Positive values, shown in red, indicate an increasing or worsening trend.
If there is data for the next financial year, then this Financial Year is considered complete.
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