Title
Flitslicht of zwaailicht : hoe opvallend zijn waarschuwingssignalen? [Flashing or rotating lights: how conspicuous are warning signals?]
Author
Alferdinck, J.W.A.M.
TNO Technische Menskunde
Publication year
1996
Abstract
This article gives an overview of the parameters influencing the conspicuity of warning lights. In general, higher light intensities are more conspicuous. A flashing light is better than a continuous light. Flashing frequencies of about 10 Hz are perceived as unpleasant, and below 1 Hz the light has no warning character. Frequencies between 2 and 4 Hz are recommended. When the flash duration is shorter than 1 s the maximum intensity should be increased for the same conspicuity level. Colour is an important for coding the vehicle type. During the daytime blue lamps are less conspicuous than yellow and red lamps. At night the opposite holds true, and blue light may even judged as too glaring. The number of warning lights and the position on the emergency vehicle influence the conspicuity. More lights give more conspicuity, if flashing synchronously.
Bij het maken van een opvallend signaal moet worden nagedacht over een groot aantal variabelen die daarbij een rol spelen, met name de eigenschappen van de menselijke waarnemer.
Subject
Safe and Clean Mobility
Traffic
Mobility
warning systems
emergency vehicles
traffic signals
colour
night driving
conspicuity
To reference this document use:
http://resolver.tudelft.nl/uuid:08bd07e3-c2e3-4187-b3a6-f474c246d060
TNO identifier
8594
Source
Verkeersknooppunt, 24 (5), 2-4
Document type
article