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Junctions is a software package by Transport Research Laboratory incorporating the ARCADY and PICADY modules which were previously separate programs. "Junctions 8" was the first integrated version. ==ARCADY== ARCADY is the acronym for (Assessment of Roundabout Capacity And DelaY). This software, produced by the Transport Research Laboratory (UK), models traffic capacity, queues and delays at roundabouts. The software is largely based on empirical relationships between roundabout geometry and capacity, which were established as the result of extensive research carried out on existing roundabouts on the UK road network, as well as controlled test track facilities over a period of over a decade. 〔(Roundabout Design for Capacity and Safety: the UK Empirical Methodology )〕 The program is used by traffic engineers when assessing existing layouts or when analysing the impacts of proposed design changes. Estimates of annual accident frequencies can also be obtained. The capacity and safety relationships which ARCADY utilises are discussed in the UK's Design Manual for Roads and Bridges.〔(DMRB TD 16/07: Geometric Design of Roundabouts )〕 RODEL is similar to ARCADY and utilises TRL equations under licence from TRL. Papers on ARCADY: * Kimber, R.M., The Traffic Capacity of Roundabouts, TRL Laboratory Report LR942, 1980. * Maycock, G. and R.D. Hall, Accidents at 4-Arm Roundabouts, TRL Laboratory Report LR1120, 1984. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Junctions」の詳細全文を読む スポンサード リンク
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