Journal of Civil Engineering Science & Technology Vol. 03/No. 01/ April 2022 9 IMPACT OF THE PCE MC CORRECTION VALUE USING MODIFIED AVERAGE TIME HEADWAY METHOD TO ROAD PERFORMANCE (CASE STUDY: VETERAN STREET, MALANG CITY) Primasari Cahya Wardhani 1* , Achmad Dzulfiqar Alfiansyah 1 1 Department of Civil Engineering, Technic Faculty, UPN “Veteran” Jawa Timur *Corresponding author: primasari.cahya.fisika@upnjatim.ac.id INTRODUCTION Malang is the second largest city in East Java after Surabaya. Malang city also has several business and trading areas that it has a crowded activity [1]. The number of public facilities on Jalan Veteran Malang is one of the factors that cause congestion in the area. As a result of high vehicle growth while it is not followed by infrastructure growth, it can cause a decrease in road performance.[2] Previous study also has been investigated and showed the result about the value of degree of saturation in the existing condition of the four-foot signalized intersection Jalan Sumbersari-Veteran Street- Bendungan Sutami Road-Bendungan Sigura-gura Road is 0.46 for the northern approach; 1.13 south approach; 1.24 approach east and 1.75 approach west. So, the level of service at this intersection is F. This result implies that the road services is not satisfaction [3]. Passenger Car Equivalent (PCE) is a conversion factor of various types of vehicles compared to passenger cars or other light vehicles concerning their impact on traffic behavior. The PCE value used in calculating the performance of urban roads refers to Manual Kapasitas Jalan Indonesia (MKJI 1997) as an Indonesian Highway Capacity Manual [4]. Not only the traffic conditions on roads in Indonesia but also on India and many other countries are heterogeneous in nature, with fast-moving vehicles (such as cars) and slow-moving vehicles (such as auto-rickshaws) sharing the same roadway[5]. There have been many changes in traffic behavior nowadays compared to the condition in 1997 [4]. The changes are caused by various factors, including the percentage of the number of motorcycles and the aggressiveness of motorcycle drivers. Therefore, it is necessary to adjust the PCE value, especially the PCE of the motorcycle (PCE MC). One of the methods used to calculate the PCE value is using the average time headway method. Based on case study research conducted by Alfiansyah (2021) on Veteran Street, Malang City, it concluded that the calculation of the PCE MC using the average time headway method is not suitable for direct use [6]. This is because the principle of measuring time headway is used for concurrent vehicles. In consequence, the principle is inappropriate to the actual conditions where motorcycles can move in a row in a similar lane. Modifications should be done on the average time headway method so that the PCE MC calculation can reflect actual conditions. One of the adjustments is considering the dimensional factor of motorcycles in Indonesia. Abstract Passenger Car Equivalent (PCE) is a conversion factor of various types of vehicles compared to passenger cars or other light vehicles concerning their impact on traffic behavior. The PCE value used in calculating the performance of urban roads refers to Manual Kapasitas Jalan Indonesia (MKJI 1997) as an Indonesian Highway Capacity Manual. There have been many changes in traffic behavior nowadays compared to in 1997. The calculation of the PCE MC value using the average time headway method does not match the actual conditions. Therefore, modifications are needed by calculating the vehicle dimension factors to obtain the PCE value. The result of the PCE MC calculation using the modified average time headway method shows 0.17. This value is smaller than the value of the PCE MC set by the MKJI 1997, which shows 0.25. Based on the analysis of traffic conditions for ten years, the DS value using the PCE MC according to the MKJI 1997 obtains DS>1. Meanwhile, the DS value calculated based on the corrected PCE MC has DS<1. The difference in the value of PCE MC has implications for road performance. As a result, it affects traffic maintenance management in the form of maintenance costs and decision-making. Keywords: Urban Road, Passenger Car Equivalent, MKJI 1997, Time Headway Article Info Received 08 March 2022 Revised 19 May 2022 Accepted 19 May 2022