police Emergence vehicle lights should feature patterns of light intensity and flashing or pulsating that will quickly catch the motorist's eye without blinding or confusing the motorist.,When attempting to clear traffic on an emergency run.
Here is a case where more may actually be better, as long as the message being sent to the lowest common denominator is consistent and simplifies the driver's task of judging the speed,size,direction of the oncoming police emergency vehicle. Thought must also be given to the height of the warning device.
It must be positioned high enough that it can be seen in a line of traffic yet low enough to be visible in the motorist's inside rearview mirror, bearing in mind that the traffic mix includes low sports cars and tall sport-utility vehicles. However, grill-mounted lights, or those mounted on the backs of outside rearview mirrors, may be used to supplement roof lights to compensate for any loss of visibility.
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