@article{ref1,
title="Internally-illuminated traffic signs",
journal="Traffic quarterly",
year="1956",
author="Neu, R.j.",
volume="10",
number="2",
pages="247-259",
abstract="The function of traffic signs is becoming increasingly critical as more and more automobiles take to the road and more and more multi-lane expressways are built. The speed and volume of traffic, and the complex interchanges on our thruways and expressways require signs that must be recognized and understood at a glance, day and night. This article describes briefly the general post-war development of acrylic signs and their characteristics, and in more detail the factors of legibility, lighting, color and location as applied to internally lighted traffic signs.<p />",
language="",
issn="0041-0713",
doi="",
url="http://dx.doi.org/"
}