An intersection is one of the means of land transportation that brings together two or more roads and forms a transportation network. The transportation network affects various elements of life such as the economic, business, social and educational fields. Along with the increase in vehicle ownership, as well as the advancement of the industrial sector, trade in the distribution of goods and services led to an increase in traffic volume. The unsignalized three-way intersection in the Purwosari mirror market is one of the small towns that is growing rapidly. Therefore, the community's activities are classified as high category.
The intersection of the three Cermai markets, Purwosari, in Purwokerto is an area of shops, places of worship, and there is also a gas station so that there is a buildup of vehicles during rush hours. This study aims to determine the degree of saturation at the intersection. Data collection was obtained through direct field surveys. At the three-way intersection of the Cermai Purwosari market in 2020, the DS value = 1,25 > 0.75 (saturated), the Qsmp is 3328,2 pcu/hour. And for C=2695 SMP/hour