Transportation is still a significant problem in Indonesia. Indonesians prefer to use private vehicles for daily mobility purposes because public transportation lacks safety and comfort and has a longer trip duration. This issue causes congestion and air pollution problems. Hence, sustainable railbased public transportation is recommended. Light Rail Transit (LRT) tends to be congestion-free and has a relatively shorter travel time with a large passenger capacity. Most LRT track constructions use the ballastless track. However, this track construction is still new in Indonesia. The research aimed to determine the most important factors in improving ballastless track construction performance on LRT. The research referred to the existing LRT construction in Indonesia using Lean Construction (LC) and Project Quality Management (PQM) approaches. Statistical science approach with SmartPLS software was also used in data processing and modeling the relationship between variables. The research was conducted by distributing questionnaires to determine the most important factors in improving the quality of ballastless tracks with variables and indicators extracted from LC and PQM methods. From five tested hypotheses, only one hypothesis is accepted. Quality control has a positive effect on track quality. It is also found that quality control becomes the most important variable in improving ballastless track quality.

The railroad transportation system facilitates the movement of people and goods and plays an important role for social and economic welfare, but behind that there are many train accidents which cause material and non-material losses. Risk management is expected to reduce the accidents that arise by identifying risks and several methods for handling them. Based on the nature of the risks that arise in train construction can be seen from two sides, namely the technical and nontechnical sides. Therefore this journal aims to identify risks based on technical and nontechnical characteristics of the risk. On the technical side, the most frequent risks arise in the form of derailment and collision, while nontechnical risks are in the form of human error and wind obstructions when the train is traveling (crosswind). Risk management of transportation infrastructure is a complex task that usually involves various stakeholders from the individual, government and private sectors so that multi-sector collaboration is seen as an important element of risk management.