In the first stage of the study , issues such as the functions and strategic importance of the erl , the regional transport demand , passenger forecast , and the possible alignments and crossing points of the rail link were studied 第一阶段研究的议题包括广深港铁路项目的功能和策略重要性,有关区域的运输需求分析及客运量预测,与及铁路的可能走线及过境位置等。