# request stop push button

> a button with which to request a bus or train stops at the next station/stop

**Wikidata**: [Q125120681](https://www.wikidata.org/wiki/Q125120681)  
**Source**: https://4ort.xyz/entity/request-stop-push-button

## Summary
A request stop push button is a device used by passengers to signal a bus or train to stop at the upcoming station or stop. It functions as a simple mechanism that, when pressed, controls the vehicle's stopping procedure. This button ensures that public transport vehicles only stop when necessary, optimizing travel efficiency.

## Key Facts
- A request stop push button is used to request a bus or train to stop at the next station or stop.
- It is classified as a type of push-button.
- It can also be considered an appliance.
- Common aliases include "alight button" and "exit button."
- Another alias is "Bus Passenger Alighting Signal Device."
- In Japanese, it is known as "降車ブザー" (kōsha buzā).
- Images of these buttons exist for both buses and train station platforms.
- It has a Commons category titled "Request stop push buttons."
- It has Wikipedia entries in Commons and Japanese.

## FAQs
### Q: What is the primary function of a request stop push button?
A: The primary function of a request stop push button is to allow passengers to signal a bus or train to stop at the next designated station or stop. This mechanism ensures that the vehicle is aware of a passenger's intention to alight.

### Q: What are some alternative names for a request stop push button?
A: Alternative names for a request stop push button include "alight button," "exit button," and "Bus Passenger Alighting Signal Device." In Japanese, it is referred to as "降車ブザー."

### Q: Is a request stop push button considered a type of computer appliance?
A: Yes, a request stop push button can be classified as an appliance. This classification indicates it is a single-purpose device dedicated to providing a specific resource, in this case, signaling a stop.

### Q: Where can request stop push buttons typically be found?
A: Request stop push buttons are typically found inside buses and trains, allowing passengers to signal their intention to exit. Images also show them on train station platforms, suggesting they can be used to request a train stop at that specific platform.

## Why It Matters
The request stop push button is a fundamental component of modern public transportation systems, playing a crucial role in operational efficiency and passenger convenience. Its significance lies in enabling a demand-responsive stopping system, where buses and trains only halt at stops when a passenger intends to alight or board (if on a platform). This prevents unnecessary stops, reducing travel time, fuel consumption, and wear and tear on vehicles. For passengers, it provides a direct and simple means to communicate their travel needs, ensuring they can exit at their desired location. Without this simple mechanism, public transport would either have to stop at every single designated stop, regardless of passenger need, leading to significantly longer journey times and increased operational costs, or rely on more complex and potentially less reliable signaling methods. The request stop push button, therefore, optimizes the balance between passenger service and operational economics, making public transit more efficient and user-friendly. It is a small but vital interface that empowers passengers and streamlines the flow of urban and interurban travel.

## Notable For
- **Direct Passenger Control:** Provides passengers with a direct and simple mechanism to signal their intent to alight, influencing the vehicle's immediate operational behavior.
- **Efficiency in Public Transport:** Contributes to the efficiency of bus and train services by enabling demand-based stopping, reducing unnecessary halts.
- **Ubiquitous Interface:** Serves as a widely recognized and standardized interface across various public transportation modes globally.
- **Dual Classification:** Uniquely classified as both a "push-button" for its mechanical function and an "appliance" for its dedicated computing resource role.

## Body

### Definition and Functionality
A request stop push button is a specialized type of push-button designed to allow passengers to signal their desire for a public transport vehicle, such as a bus or train, to stop at the next scheduled station or stop. When activated, it sends a signal to the vehicle's control system, indicating that a stop is required.

### Classification
The request stop push button is categorized under multiple classifications:
*   **Push-button:** It is fundamentally a simple mechanism featuring an area that can be temporarily pushed down to control a device.
*   **Appliance:** It can also be considered a computer appliance, functioning as a single-purpose computing device with dedicated software or firmware to provide a specific computing resource—in this case, signaling a stop request.

### Naming and Terminology
This device is known by several names across different regions and contexts:
*   **Aliases:**
    *   alight button
    *   exit button
    *   Bus Passenger Alighting Signal Device
    *   降車ブザー (kōsha buzā) in Japanese

### Visual Representation
Images associated with the request stop push button illustrate its presence in various settings:
*   A "request stop button in a bus" (e.g., Braille Hebrew Stop Button in a bus).
*   A "request stop button on a train station platform" (e.g., HaltewunschKnopfBadHerrenalbKullenmuehle).

### Global Presence
The entity has a presence in global knowledge bases:
*   It has a dedicated category on Wikimedia Commons: "Request stop push buttons."
*   It is documented in Wikipedia in multiple languages, including Commons and Japanese.