HTM | Replacing Fan Module
The Client
HTM is The Hague’s public transport company, operating trams and buses throughout the region. Through its in-house technical training programs, HTM invests in the continuous development of its employees ensuring that every technician is equipped with the right knowledge, tools, and confidence to keep the fleet running safely and efficiently.
The Question
HTM’s instructors needed a more visual, interactive way to explain complex procedures like tram fan replacement. Traditional training relied heavily on verbal explanation or limited physical access to real equipment. The goal: create a VR tool that helps instructors demonstrate each step clearly, increases engagement, and speeds up learning — while keeping safety and standardization central.
The Solution
A step-by-step, instructor-led VR training that brings complex maintenance procedures to life.
To support HTM’s instructors in teaching the correct procedure for replacing the Avenio tram fan, we created an interactive, immersive training experience in Virtual Reality. The goal was not to replace instruction, but to enrich it by giving technicians a safe, hands-on environment where they can learn by doing, under the guidance of their trainer.
Technically accurate, step-by-step learning
The training follows the official procedure for fan replacement, including:
1. Isolating power by removing the battery isolator
2. Checking for residual voltage using a multimeter tester
3. Disassembling and cleaning components (e.g. unscrewing and air-blowing the fan)
4. Using PPE (personal protective equipment) at the correct moment
5. Restarting the tram in a safe, controlled sequence
To help learners stay on track, a virtual clipboard is always within reach. It lists all the required steps and serves as a reference point — reinforcing memory and improving task recall.
Designed for simplicity and flow
All actions are performed using a single-button trigger, lowering the barrier for users unfamiliar with VR. Interactions such as picking up tools, unlocking compartments, or using a blower are intuitive and responsive. Visual cues subtly highlight the next interactive element, and if a user pauses too long, automatic hints help them continue without external intervention.
Feedback
When the user completes a correct action, they receive immediate feedback confirming it was successful. This feedback is provided instantly to reinforce correct behavior and guide the user through the training. It helps users understand that they have performed the right action and can continue to the next step without hesitation, ensuring a smooth and efficient training experience.
Quiz Questions
At a certain point in the VR training, the user will be asked a question. They can choose an answer by clicking one of the buttons. Unlike the interactive tasks that the user must follow, where they physically engage with objects and complete actions to progress, quizzes like this focus on testing the user’s understanding of the content in a more straightforward, decision-based manner. These questions are designed to assess comprehension and ensure the user is absorbing the key concepts, providing a break from the more hands-on tasks while still reinforcing learning.
Modular navigation and compact play area
The tram is divided into several zones (e.g. driver’s cabin, equipment compartments, exterior). A floating map allows users to teleport between areas. Each space is designed to fit within a 2 x 2 meter area, making the setup deployable in any classroom or depot without the risk of collisions or discomfort.
