Browse Publications Technical Papers 900570
1990-02-01

An Investigation of the Visual Effects of Heated Windscreens in Jaguar Cars 900570

The study investigated drivers' subjective responses to driving cars fitted with wired screens, and undertook laboratory tests of visibility under night-time driving conditions to examine any effects due to reflection/diffraction by the wires of light from on-coming headlamps, and any effects due to light transmission and obscuration under daytime reduced visibility (fog and snow).
FINDINGS - (a) After 2 hours driving only 6 out of 20 drivers had noticed the wires, (b) Only 1 driver complained of reduced visibility due to the wires, (c) Only 2 out of the 20 drivers said the visual effects of the wires would negatively effect their purchase decision, (d) The wires in the windscreen did not cause visual discomfort, (e) The laboratory tests found no significant reduction in visibility for either night-time or fog conditions.

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