## 5 Conclusions  
The accuracy and availability of information recorded with OBD systems and the efficiency of its transmission to drivers are essential to supporting the decision-making process undertaken by the truck driver in the traditional freight market. In the case of the AIL freight market segment, the availability and accuracy of information provided to drivers by the OBD system are prerequisites but not guarantees that the services provided will be delivered at the expected level of quality. The methodology proposed in the article takes into account best practices for ensuring the readiness of fleets of oversize vehicles and defines conditions for increasing the quality of these services. The manuscript proposes the concept of an integrated three-level ASO (Active Warning System) based on the AOP (All-in-One Platform) principle, using the DBSCAN algorithm to detect anomalies in the measured values of operational parameters. The work on this concept was based on extensive literature studies. The results of the analysis of the available publications highlighted the need to upgrade the OBD systems currently in use, particularly in relation to non-normative vehicles. According to the author's concept, the primary task of the proposed ASO is to collect and transmit information to drivers about the current performance of STT systems as well as predictions about possible minor and major faults and malfunctions that threaten an unscheduled stop of this means of transport in the near future. An important distinguishing aspect of such an ASO is the assumption that the recorded information should be communicated to the driver in graphic form. The overall objective of the study was to determine whether providing non-emergency information to drivers of non-emergency vehicles could help reduce unscheduled downtime. In contrast, the specific objective was to gain an understanding of the operational characteristics of ASO as a third-generation system that could replace the currently used OBD II. It was shown that such a system should be implemented as an integrated platform for monitoring, diagnosis, and mapping of faults capable of preliminary assessment of risks and the proposal of preventive measures for these risks, displayed on a 3D monitor. According to the authors, such an ASO can be used for the following:  
* Detecting sequences of changes and measuring operational parameters of the new states of efficiency of the monitored STT systems with an indication of the risk of their failure in the time dimension;
* Planning of drivers' actions to prevent unscheduled interruptions of transport services;
* Creation of a knowledge base that will be taken into account in the trajectory of the next planning of transport works, as well as in the improvement of used measuring-diagnostic equipment and software;
* Support T&L companies in managing their fleet of oversize vehicles (e.g., in evaluating the effectiveness of their transport work schedules, planning their maintenance, as well as the appropriate ordering of spare parts for their repair). The proposed third-generation OBD focuses on three main application areas:
* Reducing the risk of tractor-trailer as well as semi-trailer adaptation to haulage, which is a key factor for the competitiveness of T&L companies. This area refers to supporting the physical reliability of these means of transportation. It does not cover more complex aspects, such as the risk of unfitness of the \"tractor-trailer + like semi-trailer\" combination as a whole. * The overall readiness of the set \"tractor-semi-trailer + like semi-trailer\" to transport capacity on different transport routes and in different weather conditions, both within city limits and in suburban areas. * Specific readiness of the set \"tractor-semi-trailer + like semi-trailer\" to transport AIL with the geometric parameters and weights established in the transport contracts, with appropriately limited speed.