Criteria for the decision upon the application of a traffic signal at an intersection are currently receiving actual attention since the new HCM 1985 contains a procedure to estimate the level of service for unsignalized intersections. Although the HCM 85 emphasizes that this procedure is not a warrant for considerating signalisation we must expect that exactly this will become to be the most important application of the new procedure. The HCM-procedure has adopted its main features from a German guidelines which again is based on publications of Harders and Jessen. Since the time of these publications some improvements as well as some rather critical comments regarding this calculation method have been published in German literature which, unfortunately, have not been considered by the HCM-editors. Nevertheless, the basic ideas of this method provide some important benefits towards an easy numerical evaluation of the rather complex interrelations between traffic streams at an unsignalized intersection. This is the reason why also in future the framework of this procedure should be accepted. However, there are still some drawbacks which demand for some improvements. Moreover, these improvements to some extend are appropriate to simplify the application of these procedures.
Traffic flow criteria for the use of traffic signals
Verkehrsflusskriterien fuer den Einsatz von Verkehrssignalen
1986
7 Seiten, 2 Bilder, 4 Tabellen, 13 Quellen
Conference paper
English
Criteria for Removing Traffic Signals, Technical Report
NTIS | 1980
|NTIS | 1973
|Engineering Index Backfile | 1966
|TIBKAT | 1931
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