The Performance of the Pue Bongo Intersection After the Construction of the Pue Bongo Bridge

This study was conducted at the Simpang Pue Bongo intersection in Palu City, Central Sulawesi, Indonesia, which underwent geometric changes and alterations in traffic flow due to the construction of the Pue Bongo Bridge. Prior to the bridge's construction, the intersection had three Approaches; however, after the construction, it became four Approaches intersection. The aim of this study was to assess the performance of the Simpang Pue Bongo intersection under both conditions. The analysis was based on the Pedoman Kapasitas Jalan Indonesia (PKJI) 2023 guidelines, or The Guidelines for Road Capacity in Indonesia, and the research method involved conducting a traffic flow survey over a period of seven days for each condition. The data collected revealed that under the three Approaches condition, the highest peak hour occurred on Thursday, January 18, 2024, from 16:30 to 17:30, with a traffic flow of 1,980 vehicles per hour. For the four approaches condition, the highest peak hour occurred on Thursday, March 7, 2024, from 16:30 to 17:30, with a traffic flow of 2,034.4 vehicles per hour. The analysis showed that for the three Approaches condition, the intersection’s capacity (C) was 2,429.2 vehicles per hour, the saturation degree (DS) was 0.82, and the intersection delay (D) was 13.97 seconds. Under the four Approaches condition, the capacity (C) increased to 3,221.7 vehicles per hour, the saturation degree (DS) decreased to 0.63, and the intersection delay (D) reduced to 11.48 seconds. The performance results indicated a Level of Service (LoS) of category B, with intersection delay (D) ranging from 5 to 15 seconds per vehicle, based on the Regulation of the Minister of Transportation of the Republic of Indonesia No. 96 of 2015.