@article{ref1,
title="Effects of entry signals on the capacity of roundabout entries. a case-study of moore street roundabout in sheffield",
journal="Traffic engineering and control",
year="1991",
author="Shawaly, EAA and Li, CWW and Ashworth, R.",
volume="32",
number="6",
pages="297-301",
abstract="The city of Sheffield has introduced traffic signal control schemes at a number of roundabouts. One of these sites is the Moore Street roundabout, which was experiencing an unequal amount of delay occurring to the different entries during both the morning and evening peak periods. Basically, the traffic signals were intended to redistribute the delays and, hopefully, improve the performance of this roundabout in terms of queue lengths and delays during peak periods. Since the junction operated satisfactorily as a normal roundabout at times other than peak periods, the solution devised was to introduce part-time traffic signals with stop-lines on all four approaches to the roundabout. It has been found that the introduction of traffic signals turned out to be the most effective and economical solution for sharing out or balancing the entry flows between the approaches. The traffic volumes entering the roundabout have increased by 6% and 17%, respectively, in the morning and evening peak periods in the course of three years from 1984 to 1987. The observed increases in capacity are attributed to the platooning of circulating vehicles as a result of signal introduction.   <p>Language: en</p>",
language="en",
issn="0041-0683",
doi="",
url="http://dx.doi.org/"
}