Yes Yan 'an, referred to as "Yan" for short, is a prefecture-level city in Shaanxi Province. It is the ancestor of the Chinese nation, Huangdi Mausoleum, and also the location of Huangdi Mausoleum. It is a national holy land, a revolutionary holy land in China, and one of the first national historical and cultural cities announced by the State Council. There is also Baimi Avenue in Yan 'an, which is one of the important transportation hubs in Yan 'an. With the rapid development of economy, the traffic demand of the main road of 100m Avenue is increasing, and the situation of the secondary roads along the street is complicated, which leads to a sudden increase in traffic pressure during peak hours.