One of the crucial street lighting design steps considerably influencing electricity consumption is the selection of an appropriate lighting class. Therefore, after a detailed analysis of the current CEN and CIE selection procedures for streets and roads with motor or mixed traffic, several modifications of the CIE 115-2010 procedure are proposed. This way not only is its simplicity maintained but also the agreement between the two procedures is increased by up to 50%. The modifications are related to the weighting values corresponding to the traffic composition and ambient luminance as well as the inclusion of a value linked to the complexity of the visual field. The necessity for further investigation regarding the selection of lower lighting classes during the late night hours and the determination of appropriate luminance levels is also discussed.
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