## 3 Methodology  
### Case of Study  
The selection of the study area focuses on the Baron node and Avenida Argentina, Valparaiso, Chile, where trolleybuses and metro services are accessed and used (see Figure 2). This area represents a central and highly significant point within the city of Valparaiso, with a high influx of public transport users, ensuring the relevance and representativeness of the results obtained. Additionally, the Baron node stands out as a strategic connection point between the trolleybus system and the EFE metro, making it a key location to assess pedestrian access between both systems. By focusing on this area, it will be possible to thoroughly analyze the factors influencing the quality of pedestrian access, such as infrastructure, safety, and comfort, for both trolleybus and metro users. Furthermore, evaluating pedestrian access in the direction of the trolleybuses and metro in the selected sector of Valparaiso's plan is considered important, as this will help identify potential deficiencies or areas for improvement in the public spaces designated for pedestrians. This information will be valuable for enhancing the user experience and promoting greater integration and accessibility in the city's public transportation system.  
According to data provided by SECTRA [35], approximately 2,295,100 daily trips are made in the city of Valparaiso. Of this total, around 26.1% corresponds to trips made on foot. Although the most commonly used public transport modes in the area, such as buses and shared taxis, together account for about 32.8% of daily trips, the importance of walking trips should not be underestimated. Private transport represents about 29.4% of daily trips. Despite motorized travel modes accounting for 62.2% of the total, it is crucial to recognize the significant presence of walking as a pure mode of transport. This type of travel refers to cases where pedestrians make their entire journey on foot, from the origin to the final destination. Although it may seem like a smaller proportion compared to motorized transport modes, walking continues to play a relevant role in urban mobility in Valparaiso.  
Consequently, despite the percentages of trips made by other transport modes, it is essential to recognize the importance of people using infrastructure designed for pedestrian transit. Furthermore, even in trips made by motorized transport, it is common to have a segment of the journey completed on foot to reach public transport or the final destination. Therefore, the relevance of walking trips cannot be overlooked and should be considered in the planning and design of transport infrastructure.  
The selected case of study plays a fundamental role in achieving a comfortable, safe, and efficient connection between the aforementioned transportation systems. Its importance lies in its ability to enhance the user experience by providing a segment that facilitates smooth and uninterrupted travel between the metro station and the trolleybus terminal. By  
Figure 2: Area of study in Valparaiso, Chile [34].  
establishing this route, the goal is to optimize intermodality and offer a more accessible and convenient transportation solution for users.  
To carry out the evaluation of pedestrian access between the transportation modes under study, all the routes within the previously described area are identified. These routes correspond to each block that connects both modes of transport. The evaluation is conducted in both directions: from the trolleybuses to the EFE trains and vice versa, covering both pedestrian axes of the block (both sidewalks).  
The objective is to determine the level of accessibility on each of the routes, aiming to identify those that are most suitable for the target users.