Construction of a simulation model for substantiating the parameters of long-term road maintenance contracts

Abstract

This paper reports a study into the main parameters of long-term contracts for the maintenance of roads. Weaknesses in existing methods and models of substantiation of the initial characteristics of contracts have been identified. It is established that the main reason for the transition to long-term contacts in the road sector is the need to improve the efficiency and effectiveness of road asset management. This determines the main goal to maintain the operational condition of all components of roads at a level that ensures the satisfaction of user requirements and contributes to the preservation of assets. A simulation model for substantiating the parameters of long-term contracts for road maintenance has been built, which makes it possible to simulate forecast assessments of the characteristics of contracts. Underlying this study is the Monte Carlo method, as well as the triangular law of distribution, models of deterioration and restoration of the condition of road elements. Taking into consideration these models, it was established that the error in justifying the parameters of long-term contracts according to the devised method is up to 10 %. The devised model was tested by applying the developed original LTCsimula program using an example of the section of a motorway with a length of 87.3 km with an average level of requirements. According to the results of the test, the assessment of the laws of distribution of value, as well as the amount of deductions and profits of a long-term contract, was carried out. The calculation results demonstrated the model’s capability to determine the strategies for the maintenance of roads, taking into consideration the risk of implementing a contract with an error of up to 3.9 %. The practical use of the devised simulation model makes it possible to improve the efficiency of operational maintenance of roads, as well as to save from 10 % to 40 % of the cost of road maintenance

Development of method for anti-icing materials consumption optimization during winter road maintenance

“…-lack of historical data on winter road maintenance; -lack of monitoring measures in road organizations that carry out winter maintenance; -market fluctuations of anti-icing materials in connection with the state of war in Ukraine; -lack of funds for operational maintenance in general in the state; -slow introduction of long-term road maintenance contracts [10,11], etc. However, it should be noted that the application of the proposed method of optimizing the costs of anti-icing materials in the conditions of martial law in Ukraine is promising from the point of view of saving budgetary funds for winter road maintenance.…”

“…The main operations in this case are snow removal, compaction and sprinkling with sand or mixtures. According to world experience, the choice of an operational maintenance strategy is regulated by the level of service (LOS) [10,11]. Making strategic decisions inevitably leads to the need to justify a number of tactical decisions, for example, the time of applying reagents, the norm, the time of mechanical snow removal, etc.…”

Methodology for Assessing the Technical Condition and Durability of Bridge Structures

“…The coefficient method, based on initial data, starts with a reference service life of the structure which is subsequently adjusted using coefficients. These coefficients account for factors such as the quality of construction materials, design level, manufacturing quality, internal and external environmental influences, usage of the structure, and maintenance level [22].…”

Development of a Methodical Approach to the Maintenance of Highways in the Winter Period Taking Into Account Worldwide Experience

“…де РО з -обґрунтований рівень обслуговування доріг в зимовий період; 𝐺 -масив історичних даних про об'єкт обслуговування; 𝑆 -методи обробки даних, моделі прийняття рішень; 𝐿𝑇𝐶 -прогнозування довгострокового утримання за допомогою спеціального пакету програм (наприклад, LTCsimula [8]);…”