Huda, Nurul (2025) “Evaluasi Kinerja Simpang Empat Bersinyal Dan Dampaknya Terhadap Kualitas Udara Di Jalan Bypass Ngurah Rai, Denpasar Bali (Studi Kasus Simpang Ruas Jalan Imam Bonjol - Jalan Raya Kuta - Jalan Sunset Road).”. Skripsi thesis, ITN MALANG.
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Abstract
Signalized intersections are one of the critical points in the road network system that often experience congestion, especially in urban areas with high mobility levels. One such intersection facing serious traffic issues is the Four-Legged Intersection of Jalan Imam Bonjol – Jalan Raya Kuta – Jalan Sunset Road in Denpasar City, Bali. This area serves as a connector between the city center, the Kuta tourist area, and commercial zones filled with shopping centers, hotels, and restaurants. These conditions lead to high traffic volumes, resulting in increased vehicle delay times, queue lengths, and exhaust emissions, which potentially degrade the surrounding air quality. Therefore, this research aims to evaluate the existing traffic performance of the intersection, analyze the relationship between traffic delay and air quality, and formulate improvement strategies to reduce vehicular emissions. This study employs a descriptive quantitative method based on the Indonesian Highway Capacity Guidelines (PKJI 2023). Primary data were collected through field surveys, including vehicle volume, signal cycle time, queue length, number of stopped vehicles, and delay time during peak hours. Meanwhile, air quality data—specifically carbon monoxide (CO) and nitrogen dioxide (NO₂) concentrations—were obtained through direct measurements using portable monitoring equipment. Additionally, modeling and simulation were conducted using VISSIM 2024 software to develop alternative signal phase scenarios and evaluate their impact on traffic performance indicators. The analysis was carried out by comparing the existing conditions with those after the implementation of the new signal phase scenario. The analysis results indicate that the existing condition of the intersection operates at Level of Service F, with a peak degree of saturation (DS) of 1.77 and an average delay of 112.2 seconds/pcu during the evening peak hours. This performance level reflects severe traffic congestion and poor operational quality. Furthermore, exhaust emissions increased, with NO₂ concentrations reaching 79 µg/m³, which falls under the “Moderate” category based on the Air Quality Index (ISPU). After modifying the signal phase from four phases to two and adjusting the cycle time, the intersection's performance significantly improved. The DS decreased to 0.76, and the average delay dropped to 35.30 seconds/pcu, which corresponds to Level of Service D and is considered acceptable. This improvement also contributed to reducing vehicular emissions, as reflected by the lower concentrations of air pollutants. The conclusion of this study is that changing the signal phase configuration and optimizing cycle times can significantly improve the performance of signalized intersections and reduce vehicle exhaust emissions. This strategy is proven effective for intersections in high-activity areas such as Kuta, Denpasar. The study recommends the implementation of adaptive signal systems, regular air quality monitoring, and the integration of environmentally friendly public transportation as follow-up measures to support sustainable transportation and improve the quality of the urban environment. Keywords: Intersection performance, Vehicle emissions, Air quality.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Additional Information: | Nurul Huda(2121087) |
| Uncontrolled Keywords: | Kinerja simpang, Emisi kendaraan, Kualitas udara. |
| Subjects: | Engineering > Civil Engineering |
| Divisions: | Fakultas teknik Sipil dan Perencanaan > Teknik Sipil S1 > Teknik Sipil S1(Skripsi) |
| Depositing User: | Nurul Huda |
| Date Deposited: | 11 Sep 2025 05:10 |
| Last Modified: | 11 Sep 2025 05:10 |
| URI: | http://eprints.itn.ac.id/id/eprint/15052 |
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