Premature damage to pavements in Indonesia before its service life ends is partly due to climate variations and traffic loads. This study's main objective is to compare Dynamic Modulus (| E*|) and the Resilient Modulus of the Pen 60/70 AC-WC mixture using the SBS polymer modified asphalt. The performance from Marshall test shows that the highest Marshall Stability value (1007 kg) for AC-WC, and the Marshall immersion test gives the highest value of 98.13% for the same AC-WC mixture with 3% SBS. At low temperature (4°C), AC-WC with 0% SBS mixture has the highest Dynamic Modulus value (1792.7 MPa). While at high temperature (45°C), AC-WC with 3%, SBS has the highest Dynamic Modulus value (61.8 MPa). The test results show that the SBS modified asphalt mixture gives better performance at high temperatures. Overall, the AC-WC with 3% SBS mixture is better than the other mixtures. Thus, the use of SBS polymer asphalt can be a solution to improve the performance of the mixture. The dynamic modulus with AMPT test and Witczak equation showed a high correlation (0.9844). Additionally, the correlation for resilient and dynamic modulus also has higher correlation with R 2 = 0.9818.

The most common flexible pavement used in Indonesia were asphalt concrete and hot rolled sheet, with the most frequently problem caused by the extremely high traffic load. Because of that, an alternative type of pavement needed. Stone matrix asphalt (SMA) is a mixture with gap gradation which contains a large portion of coarse aggregates and forms a skeleton that efficiently spreads the load due to passing vehicles. SMA mixture consists of three types, that is thin SMA, fine SMA and rough SMA. The utilization of several types of asphalt also can be an alternative. In this research will be made a comparison about SMA mixture with buton asphalt, rubberized asphalt, and refinery asphalt based on Marshall properties, followed with Marshall immersion and cantabro test based on the optimum asphalt content. Overall based on the test result, the combination of SMA mixture with rubberized asphalt was the best. It had the highest stability with the lowest optimum asphalt content. While for the marshall immersion test, the stability of all sample after 24 hours soaked in waterbath were decreased. Also based on cantabro test result, the best index of retained strength value were for SMA mixture with rubberized asphalt.

Construction of road infrastructure in South Sumatra Province is an effort to improve the economy and accessibility. One of the infrastructure constructions is Kayu Agung-Palembang-Betung Toll Road along 111.69 Km and consists of three segments. The second segment is between Musi Landas-Betung, has an exit and entrance ramps in Gandus Sub district. The toll road has an impact on the performance of local roads such as Jl. Lettu Karim Kadir in Gandus sub-district, because the road will be the main access road from toll road to Palembang outer ring roads such as Jl. Soekarno Hatta and Jl. Mayjend Yusuf Singadekane. The purpose of this study is to identify the conditions of Jl. Lettu Karim Kadir traffic performance in 2020 and after the operation of toll roads in 2024. Traffic simulation using VISSIM program is carried out to process data, meanwhile the prediction number of travel demand is based on the VISSIM S i m u l a t i o n travel demand forecasting. The results showed that there was a decrease in the traffic performance of main road Jl. Lettu Karim Kadir. The decreasing in traffic performance is estimated from queue length and delay time parameters which means that after the operating of toll road, the condition of several roads in Gandus sub-district will be overcrowded and have the potential to occur delays and queues. This is because the division of traffic flow from Jl. Lettu Karim Kadir to local roads as well as increasing population growth in Gandus Sub-District due to the increasing construction of land use in this sub-district.