Road Safety Audit Tangerang - Merak Toll Road

Ni Luh Putu Shinta Eka Setyarini; Virgantara, Michael Gani · 2024 · OpenAlex-citations

DOI: 10.59188/eduvest.v4i4.1164

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Summary

This study conducts a Road Safety Audit (AKJ) of the Tangerang-Merak Toll Road in Indonesia to identify accident-prone areas and assess infrastructure deficiencies. The research is motivated by the high frequency of traffic accidents on this corridor, which connects Tangerang to Merak Port. Despite toll roads generally offering safer conditions, congestion and infrastructure issues contribute to significant accident rates. In 2018, the road recorded 913 accidents resulting in 25 fatalities, 155 serious injuries, and 206 minor injuries. The audit aims to provide a proactive assessment of geometric design, pavement conditions, and road equipment to mitigate risks, particularly given that existing audit guidelines for toll roads in Indonesia are still under revision. The methodology combines primary field observations with secondary traffic accident data analysis. Researchers conducted direct surveys using GoPro cameras to record road conditions, focusing on geometry, pavement quality, and the presence of signs and markings. These observations were compared against technical standards and regulations, such as Ministerial Regulation No. 13 of 2014. To identify accident-prone locations, the study applied the Equivalent Accident Number (EAN) method, weighting accidents by severity (death, serious injury, minor injury, and vehicle damage). These EAN values were then analyzed using the Upper Control Limit (UCL) and Upper Control Limit (BKA) statistical methods to determine which road segments exceeded safety thresholds. The findings reveal specific infrastructure and safety deficiencies. Direct observations identified sections with uneven, bumpy pavements due to patching, which reduce driver comfort and create surprise hazards. Crucially, several segments lacked necessary warning signs for curves, uphill/downhill gradients, and speed limits, violating regulatory standards. For instance, sections at Km 92.40–92.10 and Km 41.50–42.00 lacked curve warning signs. The statistical analysis of 2018 accident data identified three specific segments as "black spots" or accident-prone areas: West Balaraja to Cikande (Km 36.10–38.90), Cikande to Ciujung (Km 38.90–52.20), and Ciujung to East Serang (Km 52.20–60.00). The Cikande-Ciujung section exhibited the highest EAN value of 723, driven by 19 fatalities and numerous injuries, exceeding both UCL and BKA thresholds. The study concludes that while the geometric design of the Tangerang-Merak Toll Road is generally compliant, critical deficiencies in pavement maintenance and signage contribute to accident risks. The identified black spots correlate with observed infrastructure flaws, such as missing signs on curves and degraded pavement surfaces. The authors recommend stricter enforcement of sign installation regulations and improved maintenance of road surfaces. They also suggest that future research should employ more comprehensive survey techniques to ensure accurate data collection. This audit highlights the necessity of integrating proactive safety assessments with infrastructure management to reduce accident rates on Indonesia’s toll road network.

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• intersection design