Lane-by-lane modelling of unequal lane use and flares at roundabouts and signalised intersections : the SIDRA solution

This paper has been prepared in response to two recent articles published in Traffic Engineering and Control, “ARCADY Health Warning: Account for unequal lane usage or risk damaging the Public Purse!” by Chard , and “Modelling flares at traffic signal-controlled junctions” by Simmonite and Moore . These articles address prediction problems associated with the “approach” method of traffic modelling which lumps traffic in individual lanes of an intersection approach together.