oa Civil Engineering = Siviele Ingenieurswese - Lagging versus leading green right turn arrows

Volume 19, Issue 8
  • ISSN : 1021-2000



At an intersection, the right turn is the movement with the highest accident potential and the lowest capacity. At the majority of intersections, right-turners must take gaps in opposing traffic. At a signalised intersection, drivers may be presented with a flashing green arrow to aid the right turn. The SADC Road Traffic Signs Manual (RTSM) describes the decision as whether or not to install a protected right-turn stage as the single most important factor when designing a signalised intersection.

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