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The study of
performance metrics considers all these factors and determines performance
measures and recommendations of collision avoidance systems as they are
affected by several considerations.
Some of them are vehicle related and the others driver dependent as
illustrated in Figure 1.2. Most of the
vehicle variables have a wide operating range with significant differences
especially in certain operating regions.
This leads to either defining performance metrics as dependent on
specific technologies or design methodology, or combination of all
technologies/vehicle implementations.
Figure 1.2 does not show the system delay that is defined as the time
required to acquire the information external and internal to the vehicle,
process the data, and execute algorithms to determine the action as defined
in Figure 1.1. Normally, this delay is
much shorter compared to overall delays in the system.
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