Nine forms of behaviour when given
informativel/support systems that affect
risk
1 - The direct, intended effect .
E.g., drivers will reduce their % 0! short headways with an ACC, it
they just act correctly to the warning
2 - And they will obey what the Infrastructure (signs, VMS)
tells them
E.g., ISA system advises 100, but VMS says 70 due to trafiic
conditions