<![CDATA[In surface coal mining, haul road geometry directly influences vehicle travel times, motion resistances, and production output. In May 2025, coal production at PT X reached only 95.49% (28,399.74 tons) of its 29,741 ton target due to geometric bottlenecks along the 1.45-km haul road. This study evaluates the haul road geometry against Kepmen ESDM No. 1827 K/30/MEM/2018 and AASHTO standards, analyzing the productivity gains after geometric redesign. Primary data were gathered via GNSS RTK and clinometers, followed by rimpull-based cycle time modeling on a fleet of five Hino 500 FM 280 JD dump trucks. Field results revealed geometric non-compliances, including an excessive 10.06% grade on segment B–C (standard max. 8%), narrow curve widths on segments F–G (13.56 m) and K–L (11.01 m) against the 14.57 m standard, and substandard superelevation across all curves. The actual single-truck cycle time averaged 17.43 minutes, producing 44.83 tons/hour. Following geometric improvements—cutting the B–C grade to 6.28% and widening curves—cycle time decreased by 8.77% to 15.90 minutes. Consequently, single-truck productivity increased to 49.14 tons/hour (total fleet: 245.70 tons/hour), driving monthly output to 31,130.19 tons (104.67% of the target, reflecting a 9.61% increase). Aligning mine haul road geometry with technical standards significantly optimizes hauling efficiency and ensures production targets are met.]]>
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