# System Proposal for Mass Transit Service Quality Control Based on GPS Data
## 5 System Overview
### The SQCM
#### 5.2.1 The Improved Transport Network Model
We may also note that during the months of July and August, the weekday services are more punctual than during the rest of the year, possibly because those months are typically during the main holiday period, so there is less traffic and lower demand. The system described in this article provides two main contributions. The first is that it is a complete, detailed and realistic description of a system for measuring the regularity and punctuality of regular public passenger transport by road, solving the challenge of massive data management involved in continuously monitoring regularity and punctuality. The description is complete and detailed because it includes all the formal and technological components and details of the system. It has been implemented with elements that are commonly used by transport operators, thereby facilitating implementation and deployment. The second contribution is the technique used to obtain the arrival times at the stops of the transport network. This technique is the \(k\)-means classification method, used to distinguish stationary data due to scheduled stops from stationary data due to the existence of an unscheduled stop, i.e., due to a traffic sign or traffic congestion or the condition of the road on which the vehicle is travelling. Figure 10: Stop categories according to delay, irrespective of day and time. **Acknowledgments:** The authors wish to express their gratitude to the Autoridad Unica del Transporte de Gran Canaria (Transportation Agency of Gran Canaria) and to the public transport company Global Salcai-Utinsa S.A. They also declare that they have not received any funds to cover the publication costs of this article. Figure 11: RTV metric values obtained during 2015. Graph (**a**) displays the values for each weekday service line that runs from 07:40. Graph (**b**) displays the values for each service line that runs on Sunday from 08:40. **Author Contributions:** [PERSON] directed the research study; all the authors contributed to the design of the system architecture; [PERSON]-A. and [PERSON] developed the AVL system; [PERSON] and [PERSON] were responsible for developing the system data model and the service quality control module; all the authors contributed to system testing; all the authors participated in the preparation of this manuscript. **Conflicts of Interest:** The authors declare no conflict of interest. ## References

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