@article{ref1,
title="Guidelines for the use of protected/permissive left-turn phasing",
journal="ITE journal",
year="1987",
author="Agent, K.",
volume="57",
number="7",
pages="37-42",
abstract="A study is reported which attempted to develop guidelines to aid traffic engineers in deciding whether permissive left-turn phasing is appropriate for use at a given location. A literature review was made, a survey of highway district traffic engineers was conducted to locate intersections with permissive phasing, and before-and-after accident data were collected. The results are given of the inventory and the accident analysis, and recommended guidelines are presented. It is noted that protected/permissive is the preferable method of left-turn phasing because of savings in time compared with protected-only phasing. However, there is an associated increase in accident potential, and conditions under which it should not be used are listed.<p />",
language="",
issn="0162-8178",
doi="",
url="http://dx.doi.org/"
}