Electronic Theses and Dissertation

Persimpangan Jembatan Cot Iri - Blang Bintang merupakan simpang tak bersinyal berlengan empat yang mempertemukan Jl. Teuku Iskandar, Jl. Tgk. Bakurma, dan Jl. Tengku Hasan di Desa Bakoy, Kecamatan Ingin Jaya, Kabupaten Aceh Besar. Simpang ini menjadi salah satu akses penting menuju Bandara Sultan Iskandar Muda dan Jalan Tol Sigli-Banda Aceh, sehingga arus lalu lintas yang melintas cukup tinggi, terutama pada jam sibuk. Kondisi tersebut menunjukkan perlunya evaluasi kinerja simpang. Penelitian ini bertujuan untuk menganalisis kinerja simpang tak bersinyal pada kondisi eksisting, memproyeksikan kinerja simpang dalam lima tahun mendatang, serta menentukan alternatif penanganan yang tepat untuk meningkatkan kinerja simpang. Analisis dilakukan menggunakan Pedoman Kapasitas Jalan Indonesia (PKJI) 2023. Data volume lalu lintas diperoleh melalui survei manual selama tiga hari, yaitu dua hari kerja dan satu hari libur (Senin, Kamis, dan Minggu). Berdasarkan hasil survei, volume tertinggi terjadi pada Senin, 24 November 2025 pukul 17.00-18.00 WIB sebesar 2.333 smp/jam, dengan kapasitas eksisting 2.356 smp/jam, derajat kejenuhan (DJ) 0,99, tundaan (T) 19,01 det/smp, dan peluang antrian (Pa) 39,36%-77,84%. Pada proyeksi lima tahun mendatang, nilai DJ meningkat menjadi 1,18 yang menunjukkan bahwa simpang berada pada kondisi jenuh dan melampaui batas DJ ≤ 0,85. Alternatif pelebaran pendekat pada jalan minor meningkatkan kapasitas menjadi 2.701 smp/jam dengan DJ 1,03, namun penurunannya belum signifikan. Sementara itu, perubahan menjadi simpang tak sebidang melalui pembangunan underpass pada jalan minor menghasilkan kapasitas 2.083 smp/jam pada ruas minor dan 3.198 smp/jam pada simpang atas, dengan DJ masing-masing 0,60 dan 0,49, sehingga memberikan kinerja yang lebih baik dibandingkan alternatif pelebaran.

Kata Kunci : simpang tak bersinyal, derajat kejenuhan, tundaan, PKJI 2023, underpass.

The Cot Iri Bridge - Blang Bintang intersection is an unsignalized four-leg intersection connecting Teuku Iskandar Street, Tgk. Bakurma Street, and Tengku Hasan Street, located in Bakoy Village, Ingin Jaya District, Aceh Besar Regency. This intersection serves as an important access route to Sultan Iskandar Muda International Airport and the Sigli-Banda Aceh Toll Road, resulting in relatively high traffic volumes, particularly during peak hours. These conditions indicate the need for an evaluation of the intersection performance. This study aims to analyze the performance of the unsignalized intersection under existing conditions, project its performance over the next five years, and determine appropriate improvement alternatives to enhance its performance. The analysis was conducted using the Indonesian Road Capacity Guidelines (PKJI) 2023. Traffic volume data were collected through manual surveys conducted over three days, consisting of two weekdays and one weekend (Monday, Thursday, and Sunday). Based on the survey results, the highest traffic volume occurred on Monday, November 24, 2025, between 17:00 and 18:00 WIB, reaching 2,333 pcu/hour. The existing capacity was 2,356 pcu/hour, with a degree of saturation (DS) of 0.99, an average delay of 19.01 seconds/pcu, and a queue probability ranging from 39,36% to 77,84%. In the five-year projection, the DS increases to 1.18, indicating that the intersection will operate under oversaturated conditions, exceeding the acceptable limit of DS ≤ 0.85. An alternative improvement involving widening of the minor road approach increases the capacity to 2,701 pcu/hour, reducing the DS to 1.03; however, the improvement is not yet significant. Meanwhile, converting the intersection into a grade-separated intersection by constructing an underpass on the minor road results in a capacity of 2,083 pcu/hour on the minor road segment and 3,198 pcu/hour at the upper intersection, with DS values of 0.60 and 0.49, respectively. This alternative provides better performance compared to the widening scenario. Keywords : unsignalized intersection, degree of saturation, delay, PKJI 2023, underpass.