Traffic Impact Assessment of Flood Control Infrastructure Construction Activities
DOI:
https://doi.org/10.32492/nucleus.v5i2.5208Keywords:
Traffic impact assessment, Flood control construction, Level of service, PKJI 2023Abstract
Urban flood control construction in densely populated corridors generates substantial but frequently unassessed traffic disruptions, particularly where road network capacity margins are already constrained prior to construction commencement. This study assesses the traffic impacts of the National Urban Flood Resilience Project (NUFReP) Badera River flood control construction works in Deli Serdang Regency, North Sumatra, Indonesia, and formulates stage-specific traffic management and engineering (MRLL) measures to maintain safe and orderly traffic flow throughout the construction period. A three-scenario comparative framework — Do-Nothing Without Construction, Do-Nothing With Construction, and Do-Something With Construction — was applied to six affected road segments and one unsignalized intersection using the Indonesian Road Capacity Guideline (PKJI 2023), based on classified traffic volume, spot speed, and road geometry data collected through field surveys in August 2025. Results indicate that existing network performance is predominantly at Level of Service B, with two segments already at LOS C under baseline conditions. Construction activities are projected to degrade Jl. Kapten Sumarsono / Asrama from LOS C to LOS D under unmitigated conditions, while the Toll Helvetia Gate intersection approaches but does not exceed the PKJI 2023 capacity threshold of DS = 0.85. The proposed MRLL measures — comprising restricted material transport hours, traffic officer deployment, temporary signage, and staged public notification — restored LOS to baseline or better on four of six affected segments. Residual impacts on two segments are manageable through supplementary afternoon-period construction scheduling restrictions, confirming overall network resilience under the proposed mitigation framework.
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