TW202217673A - Bus ride assist system and bus ride assist method - Google Patents

Abstract

A bus ride assistance method includes: sending a reservation message via a mobile device; wherein the reservation message includes a boarding station selected by a visually impaired person. The reservation message is transmitted by a mobile device server to a car server to receive the reservation message and send the reservation message; and by a car machine installed on a bus to receive the reservation message. When the car machine is receiving the reservation message, and when the distance to the boarding station is less than the threshold of the number of stops or the threshold of distance, each will send out a reminder signal. After receiving the reservation message, the bus driver drove into the station and parked the front door at the waiting assistant guidance device for the visually impaired to board the bus.

Description

Bus ride assistance system and bus ride assistance method

The present invention relates to an assistance system, in particular to a bus riding assistance system and a bus riding assistance method suitable for a bus.

Just as the public uses means of transportation to meet activities such as work, school, medical treatment, visiting friends, shopping, etc., the visually impaired also have the same needs, and most of the visually impaired rely on personnel to accompany them when they go out. For the visually impaired, in places where other public transportation networks cannot cover high-frequency travel needs such as employment and medical treatment, buses are often the lowest-cost means of transportation with dense routes. However, if the visually impaired cannot take the bus independently, and also cannot afford the transportation costs such as taxis and rehabilitation buses, they will lose the right to travel freely.

Although the bus is the most commonly used public transportation tool for the visually impaired, it needs to proactively solicit entry and stop positions in advance, which will not only cause inconvenience to the visually impaired, but may also be dangerous in a changing environment. For example, the bus does not stop at every stop, and passengers need to wave at the stop sign like a taxi to let the bus driver know that there are passengers at the stop sign to get on the bus. Even if the bus enters the station, there is no accurate stop point. For the visually impaired who cannot identify the route of the bus, or even touch the bus to find the door, the bus is very difficult. Even if the bus is experienced, it is often dangerous. .

In the past, before taking public transportation, the visually impaired would be taught by a orientee how to get to a fixed station and how to express their needs. Among them, the way to express the willingness to take a bus is to raise a placard. However, this method is easily affected by environmental factors, such as night or rainy days, the vision of the bus driver is affected, and the effect of placard raising is poor. In addition, visually impaired people also hope to express their needs for rides in a low-key way, that is, they do not want to reveal their identity as visually impaired when they hold a placard.

Therefore, how to let the visually impaired express their willingness to ride to the bus driver in a low-key and safe manner has become one of the problems to be solved in this field.

In order to solve the above problems, one aspect of the present disclosure provides a bus riding assistance system. The bus ride assistance system includes a mobile device, a mobile device server, a car machine server, a car machine and a waiting aid guide device (waiting area). The mobile device is used for sending a reservation message, wherein the reservation message includes a boarding station selected by a visually impaired person. The mobile device server and the vehicle server are used for receiving the reservation message and sending the reservation message. The car machine is installed on a bus, and the car machine is used to receive the reservation message. The car machine respectively sends out a prompt signal when it receives the reservation message, and when the distance from the boarding station is less than a stop threshold or a distance threshold. After receiving the reservation information, the bus driver will drive into the station and park the front door at the waiting aid guide device for the visually impaired to get on the bus.

Another aspect of the present invention is to provide a bus boarding assistance method, comprising: sending a reservation message through a mobile device; wherein the reservation message includes a boarding station selected by a visually impaired person; Receive the reservation message, and transmit the reservation message; and receive the reservation message through a car machine set on a bus, when the car machine is less than a stop threshold or a distance threshold, a prompt signal is issued.

Therefore, the bus ride assistance system and the bus ride assistance method enable the visually impaired to express their willingness to ride to the bus driver in a low-key and safe manner. The method of prompting the reservation message includes the visually impaired person sending the reservation message through the mobile device to the mobile device server in sequence. The car machine server and the car machine server, and the car machine server will send the reservation message to the corresponding car machine. Since the car machine on each bus is equipped with a GPS system, the bus itself can know the distance between itself and each station, and can also Send the GPS position to the travel control center server, the travel control center server prompts the car machine server to move the vehicle according to the GPS positions of multiple buses, and when the car machine prompts the system to receive the reservation message, the car machine can simultaneously When receiving the reservation message, and when the distance from the boarding station is less than the one-stop threshold or a distance threshold, send the first and second reminder signals to the display, broadcasting device and lighting device respectively, so that these devices remind the driver and let the driver It is learned that the car machine server has received the reservation message. Among them, the red flashing light can increase the reminder of the reservation information, the short text message can facilitate the driver to quickly get the information, the prompt sound can ensure that the driver can focus on the road conditions, and the feedback button can provide the passenger company and the team's grasp of the service. Let the bus driver know the reservation information and be reminded of the bus stop for the visually impaired at the appropriate time.

The bus ride assistance system and the bus ride assistance method can provide a software and hardware integrated bus reservation process for the visually impaired to register through mobile devices for the environmental constraints of the bus system that does not stop at each stop and the bus booths with large terrain differences. Or a special design interface to know the bus dynamics, and send a reservation message to reserve a bus, and the driver can also receive the reservation message in real time, so that the reserved bus and the visually impaired can meet in the waiting area of the bus booth. pick-up service.

The following descriptions are preferred implementations for completing the invention, and are intended to describe the basic spirit of the invention, but are not intended to limit the invention. Reference must be made to the scope of the following claims for the actual inventive content.

It must be understood that words such as "comprising" and "including" used in this specification are used to indicate the existence of specific technical features, values, method steps, operation processes, elements and/or components, but do not exclude possible Plus more technical features, values, method steps, job processes, elements, components, or any combination of the above.

The use of words such as "first", "second", "third", etc. in the claims is used to modify the elements in the claims, and is not used to indicate that there is a priority order, antecedent relationship, or an element between them Prior to another element, or chronological order in which method steps are performed, is only used to distinguish elements with the same name.

Please refer to FIGS. 1-2. FIG. 1 is a block diagram illustrating a bus riding assistance system 100 according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating a bus riding assistance method 200 according to an embodiment of the present invention. As shown in FIG. 1 , the bus riding assistance system 100 includes a mobile device 10 , a vehicle server 20 and a vehicle 30 . In one embodiment, the bus reservation system 100 further includes a one-line control center server 40 .

In one embodiment, the mobile device 10 is a portable communication electronic device such as a mobile phone, a tablet, etc., for example. An application program can be installed in the mobile device 10, and this application program can support voice operation or special interface design, such as: a card block enlarges the content to be displayed (such as bus code, direction, passing stop sign, etc. etc.), arrange multiple card-style blocks in order from top to bottom, and use contrasting colors such as blue, yellow, black, and white to present the card-style blocks. In addition, the voice operation reads the text content of the card block from top to bottom, allowing the visually impaired (including the visually impaired and the color-impaired) to select and reserve a bus.

In one embodiment, the vehicle server 20 may be a server of a vehicle manufacturer (the vehicle server is not owned by the bus manufacturer, there are two manufacturers in Taipei City, Lihao and Baolu). Connect to the car machine 30 on the bus of your own car dealership.

In one embodiment, the vehicle machine 30 includes a communication device (not shown), a processor (not shown), a display 31 , a broadcasting device 32 , a lighting device 33 and/or a feedback button 34 . In one embodiment, the vehicle 30 is placed within the reach of the bus driver.

In one embodiment, the communication device may be implemented as, for example, a Wi-Fi device, a 3G (3rd generation mobile communication technology, 3rd-Generation) communication device, a 4G communication device (4th generation mobile communication technology, 4th-Generation) Or 5G communication device (5th generation mobile communication technology, 5th-Generation).

In one embodiment, the processor may be implemented as, for example, a microcontroller, a microprocessor, a digital signal processor, an application specific integrated circuit (ASIC) ) or a logic circuit.

In one embodiment, the display 31 may be a screen that can only display images or a touch-sensitive display.

In one embodiment, the broadcasting device 32 is, for example, a speaker, an earphone or a loudspeaker.

In one embodiment, the lighting device 33 may be a light-emitting diode (LED).

In one embodiment, the feedback button 34 may be a physical button. When the feedback button is pressed, a button pressing signal is generated, and the processor transmits the button pressing signal from the communication device.

In one embodiment, the travel control center server 40 is, for example, a server of the Taipei City Public Transport Office system, and the travel control center server 40 can receive and integrate the global positioning system (Global Positioning System, GPS) sent by all buses. location information. In one embodiment, the travel control center server 40 may prompt the vehicle-machine server to move the vehicle according to the GPS positions of the plurality of buses.

In one embodiment, the vehicle 30 transmits the GPS positioning information to the travel control center server 40 through the communication device. In one embodiment, the travel control center server 40 stores the GPS positioning information of the vehicle 30 and the bus dynamic information (for example, the vehicle 30 has arrived at Huguang Market Station or the vehicle 30 will be next station arrives at MRT Donghu Station) to the mobile device 10 and the vehicle server 20 .

In one embodiment, the bus ride assistance method 200 may be implemented by elements in the bus ride assistance system 100 .

In step 210, a reservation message is sent by a mobile device 10, wherein the reservation message includes a boarding station selected by a visually impaired person.

In one embodiment, the appointment message sent by the visually impaired terminal operating the mobile device 10 to the vehicle machine and driver is only at the boarding station; the “reservation” at the alighting station can actually be more precisely defined as a “reminder”, which is an action The reminder to the visually impaired individual based on the bus dynamics stored in the travel control center server 40 in the device 10 does not pass through the vehicle machine server, the vehicle machine and/or the driver.

In one embodiment, the visually impaired can select a boarding station and a get-off station through the mobile device 10 (using voice and/or with a special interface design), and the reservation information includes a boarding station. In one embodiment, the alighting reminder has nothing to do with the reservation message connected to the vehicle.

In one embodiment, the mobile device 10 receives the GPS positioning information from the travel control center server 40 , selects a bus according to the GPS positioning information, and obtains a dynamic information of the bus or sends a reservation message. In one embodiment, the waiting area has nothing to do with the reservation information, and is only an offline waiting point set at a bus station and for the visually impaired to facilitate tracing. For example, the reservation message received by the driver is "Ride for the visually impaired at Gongguan Station of the MRT", and this reservation message includes the information of the boarding station.

In one embodiment, the travel control center server 40 receives a GPS positioning information sent from the vehicle 30 , and transmits the GPS positioning information to the vehicle server 20 . In this way, the bus dispatcher can monitor the status of the reserved bus. Assuming that the reserved bus has passed the station (the boarding station selected by the visually impaired), the mobile device server will send an inquiry message (Note: the inquiry message is " Do you want to take the Brown 9 Nanjing Route?" You can click "Arrived on the bus", "Missed the bus" or "Cancel reservation". Guided to book the next bus) to the mobile device 10.

In one embodiment, the mobile device server is communicatively coupled to the mobile device 10 , and the mobile device server is used for receiving and transmitting an information operation behavior of the user on the mobile device 10 . Information operation behaviors, such as querying bus dynamics, setting common routes, etc.

In step 220, an on-board server 20 receives the reservation message and transmits the reservation message.

In one embodiment, when the on-board server 20 receives the reservation message and determines that the bus schedule is normal, the on-board server 20 transmits a reservation result to the mobile device 10 according to the GPS positioning information. The reservation result includes a message of whether the reservation is successful, a bus code, a dynamic information or a bus arrival time. The reservation result is for example: bus Zong 9, which is going to Fangji Middle School Station, and is expected to arrive at Huguang Market Station in 10 minutes. (Pick-up station selected by the visually impaired).

In step 230, a car machine 30 installed on a bus receives the reservation message. When the car machine 30 receives the reservation message, and when the distance from the boarding station is less than a stop threshold or a distance threshold, each A reminder signal is issued. After receiving the reservation message, the bus driver will drive to the boarding station and park the front door at the waiting aid guidance device for the visually impaired to get on the bus.

In one embodiment, the waiting guide device is a waiting area. In other words, the waiting area is used to assist the driver to stop and the visually impaired to execute the waiting guidance device for getting on the bus, and is installed in a bus stop.

In one embodiment, the vehicle 30 emits a prompt sound through a broadcasting device 34 , a display 30 displays a text message, or a lighting device 33 emits a flashing light signal to present the prompt signal.

In one embodiment, the driver of the vehicle 30 can press the feedback button 34 after seeing the prompt signal. When the feedback button 30 is pressed, a button pressing signal will be generated, and the vehicle 30 will transmit the button pressing signal to the vehicle servo. device 20.

In one embodiment, when the display 30 is a touch-sensitive display, after the driver of the vehicle 30 sees the prompt signal, the driver can press the "receive" button icon displayed on the touch-sensitive display, and the vehicle The machine 30 transmits the button pressing signal to the car machine server 20 .

Please refer to FIGS. 3 to 8 . FIGS. 3 to 8 are schematic diagrams illustrating usage scenarios of the bus riding assistance system 100 according to an embodiment of the present invention.

In Figure 3, the visually impaired tracked down to the waiting area WA of the bus stop.

In one embodiment, the application in the mobile device 10 guides the visually impaired to the waiting area WA of the bus station through audio or card blocks. The setting of the waiting area WA allows the bus driver to see the visually impaired ready to board before the bus driver enters the station.

In Figure 4, a visually impaired person uses the application program in the mobile device 10 to reserve a specific bus. If the car-machine server does receive the reservation message, it will return a notification of "reservation successful" to the mobile device. The car machine 30 will receive the reservation message from the car machine server 20. The first reservation message includes a button icon of "received". The driver can press the feedback button 34 through the car machine 30 or the message displayed on the touch-sensitive display. The icon of the "Received" button is convenient for the service operation team and dispatcher to record the status of the driver's receipt of messages. In one embodiment, the mobile device 10 can receive the bus dynamic information from the travel control center server 40 .

In one embodiment, the determination of "successful reservation" on the mobile terminal is that the reservation message is indeed transmitted to the vehicle server, whether the subsequent reservation information is transmitted to the vehicle to issue a total of two reminders, and whether the driver presses the first reminder button. Confirmation of receipt will not affect the determination of the success of the reservation. The reason is that the driver may not be available to respond to the reservation, but after testing, most of them will notice the reservation prompt, or will pick up the visually impaired immediately in the waiting area.

In Fig. 5, when the car machine 30 receives the reservation message from the car machine server 20, the car machine 30 sends out a prompt sound through the broadcasting device 32, the display 31 displays a text message, and/or the lighting device 33 emits a flashing light signal to A notification signal is displayed.

In one embodiment, the prompt signal can be presented multiple times, for example, a first prompt signal is presented first, and after a period of time, a second prompt signal is presented. For example, when the car machine 30 receives the reservation message, the first prompt signal is triggered, and the number of stops between the car machine 30 and the alighting station is less than a threshold of the number of stops (for example, 3 stops) or less than a distance threshold (for example, 100 meters), trigger the second prompt signal.

In one embodiment, the first prompt signal can prompt the display 31 to continuously display a text message for 1-2 minutes, and stop after the driver pushes back the feedback. The text message includes the boarding station for the visually impaired, and the text reads "There are visually impaired passengers at XXX station".

In one embodiment, the first prompt signal can be produced in the form of 8-bit electronic sound, so as to be played by the broadcasting device 32 (such as a broadcaster) on the bus. The purpose of the first reminder signal is to help the driver realize that the visually impaired passenger is making an appointment and understand the content of the appointment. When the first reminder signal is issued, it will still take some time for the bus to reach the actual pick-up station. Therefore, the first reminder signal will be avoided to be too strong to avoid affecting the driver's attention. The first reminder signal will sound for a short time (about 2 Second).

In one embodiment, the first prompt signal prompts the lighting device 33 to flash a red light, and the light continues to flash until the driver pushes the button for feedback, so as to increase the promptness of the reservation information.

Then, the driver can press the feedback button 34 through the car machine 30 or the "receive" button icon displayed on the touch-sensitive display, which means the reservation is successful. The car machine 30 transmits the reservation success information to the car machine server 20. The mobile server 20 then transmits the reservation success information to the mobile device 10 .

In one embodiment, a second prompt signal is triggered when the vehicle 30 and the disembarking station are less than a stop threshold (eg, 3 stops) or less than a distance threshold (eg, 100 meters).

In one embodiment, the purpose of the second prompt signal is to prompt the driver to pick up the visually impaired at the next stop (or less than a threshold of one stop or less than a threshold of distance), so as to avoid the driver from forgetting. Because the required prompt will be stronger, the second prompt signal can be produced in the form of 8-bit electronic sound, so as to be played on the bus by the broadcasting device 32 (such as a broadcaster), and the second prompt signal and the first prompt signal The prompt signals are obviously different to quickly attract the driver's attention. The design focuses on elements such as long-term (about 4~5 seconds), high frequency, and pleasant and bright melody.

In one embodiment, when the lighting device 33 receives the second prompt signal, the lighting device 33 flashes a red light to increase the promptness of the reservation information.

In one embodiment, since each bus is equipped with a GPS system, the bus itself can know the distance between itself and each station. In one embodiment, the GPS system can be integrated in the vehicle 30 or other vehicle-mounted devices.

In Fig. 6, when the reserved bus is about to enter the boarding station, the driver sends an incoming stop message to the car machine server 20 through the car machine 30 again, and the car machine server 20 then transmits the incoming stop message to the action. device 10. The visually impaired can use the mobile device 10 to know that the reserved bus is about to enter the boarding station and is ready to get on the bus. In one embodiment, the driver parks the front door of the bus in the waiting area WA when he enters the station.

In Figure 7, after the visually impaired gets on the bus, the mobile device 10 can set the alighting station or learn the current travel station. The mobile device 10 provides the visually impaired person to track the bus dynamics in real time.

In one embodiment, since the GPS system on the bus can transmit the GPS position to the travel control center server 40, the travel control center server 40 can transmit the bus dynamic information to the mobile device 10 according to the GPS position, so the mobile device 10 can provide video information. Disabled people can track the bus dynamics in real time.

In one embodiment, the visually impaired can use the mobile device 10 to modify the alighting station while the bus is running. The mobile device 10 will dynamically compare the modified alighting station with the bus in the travel control center server 40, so as to display the countdown stop on the mobile device 10 in real time to remind the visually impaired to get off the bus.

In Figure 8, when the bus arrives at the alighting station, the bus driver stops the front door of the bus in the waiting area WA, so that the visually impaired can get off the bus smoothly.

In one embodiment, the method for the visually impaired to get off the bus is the same as that described in the previous paragraph, and the alighting reminder is only through the bus dynamic reminder of the bus control center server 40 to remind the countdown stop, and the information is not transmitted to the vehicle server 20 and the vehicle 30 .

It can be seen from the above that the visually impaired person can make a reservation to get on the bus, learn the dynamic information of the reserved bus, confirm getting on the bus, make a reservation for getting off and/or get off the bus through the mobile device 10 .

Therefore, the bus ride assistance system and the bus ride assistance method allow the visually impaired to express their willingness to ride to the bus driver in a low-key and safe manner. The method of prompting the reservation message includes the visually impaired person sending the reservation message to the bus machine server through a mobile device. The car machine server then sends the reservation message to the corresponding car machine. Since each bus is equipped with a GPS system, the bus itself can know the distance between itself and each station, and can also send the GPS position to the travel control center server. The travel control center server prompts the car-machine server to move the vehicle according to the GPS positions of multiple buses, and when the car-machine prompting system receives the reservation message, the car-machine can send the first and second prompt signals to the display, Broadcasting device and lighting device, so that these devices remind the driver, let the driver know that the car machine server has received the reservation message. Among them, the red flashing light can increase the reminder of the reservation information, the short text message can facilitate the driver to quickly get the information, the prompt sound can ensure that the driver can focus on the road conditions, and the feedback button can provide the passenger company and the team's grasp of the service. Let the bus driver know the reservation information and be reminded of the bus stop for the visually impaired at the appropriate time.

The bus ride assistance system and the bus ride assistance method can provide a software and hardware integrated bus reservation process for the visually impaired to register through mobile devices for the environmental constraints of the bus system that does not stop at each stop and the bus booths with large terrain differences. Or a special design interface to know the bus dynamics, and send a reservation message to reserve a bus, and the driver can also receive the reservation message in real time, so that the reserved bus and the visually impaired can meet in the waiting area of the bus booth. pick-up service.

The methods of the present invention, or specific versions or portions thereof, may exist in the form of code. The code may be contained in physical media, such as floppy disks, optical discs, hard disks, or any other machine-readable (such as computer-readable) storage media, or not limited to external forms of computer program products, where, When the code is loaded and executed by a machine, such as a computer, the machine becomes a device for participating in the present invention. The code may also be transmitted through some transmission medium, such as wire or cable, optical fiber, or any type of transmission, wherein when the code is received, loaded and executed by a machine, such as a computer, the machine becomes used to participate in this document. invented device. When implemented on a general-purpose processing unit, the code combines with the processing unit to provide a unique device that operates similarly to application-specific logic circuits.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

100: Bus ride assistance system 10: Mobile Devices 20: Car-machine server 30: car machine 31: Display 32: Broadcaster 33: Lighting Installation 34: Feedback button 200: Bus ride assistance methods 210~230: Steps WA: waiting area

FIG. 1 is a block diagram illustrating a bus riding assistance system according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating a method for assisting bus riding according to an embodiment of the present invention. FIG. 3 is a schematic diagram illustrating a usage situation of the bus riding assistance system according to an embodiment of the present invention. FIG. 4 is a schematic diagram illustrating a usage situation of the bus riding assistance system according to an embodiment of the present invention. FIG. 5 is a schematic diagram illustrating a usage situation of the bus riding assistance system according to an embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a usage situation of the bus riding assistance system according to an embodiment of the present invention. FIG. 7 is a schematic diagram illustrating a usage situation of the bus riding assistance system according to an embodiment of the present invention. FIG. 8 is a schematic diagram illustrating a usage situation of the bus riding assistance system according to an embodiment of the present invention.

200: Bus ride assistance methods

210~230: Steps

Claims (11)

A bus ride assistance system comprising: a mobile device for sending a reservation message, wherein the reservation message includes a boarding station selected by a visually impaired person; a mobile device server for receiving and transmitting the information operation behavior of the user on the mobile device, and for transmitting the reservation message; an on-board server for receiving the reservation message and transmitting the reservation message; and A car machine is arranged on a bus, the car machine is used for receiving the reservation message, and when the car machine is less than a stop threshold value or a distance threshold value from the boarding station, a prompt signal is issued. For example, the bus ride assistance system of claim 1, also includes: A waiting area, which is used to assist the driver to stop and the visually impaired to execute the waiting guidance device to get on the bus, is installed in a bus stop. For example, the bus ride assistance system of claim 1, also includes: The one-line control center server is used for receiving a global positioning system (Global Positioning System, GPS) positioning information sent from the vehicle and sending the GPS positioning information to the vehicle server. The bus boarding assistance system of claim 2, wherein the mobile device server transmits a reservation result to the mobile device according to the GPS positioning information; the reservation result includes a dynamic information or a bus arrival time at a boarding station. The bus riding assistance system of claim 2, wherein the mobile device receives the GPS positioning information from the travel control center server, selects the bus according to the GPS positioning information, and obtains a dynamic information of the bus information or send the appointment message. The bus riding assistance system as claimed in claim 1, wherein the vehicle machine emits a prompt sound through a broadcasting device, a display displays a text message, or a lighting device emits a flashing light signal to present the prompt signal. A bus ride assistance method comprising: Sending a reservation message through a mobile device; wherein, the reservation message includes a boarding station selected by a visually impaired person; receiving the reservation message by an on-board server, and transmitting the reservation message; and A car machine installed on a bus receives the reservation message, and when the car machine is less than a stop threshold value or a distance threshold value from the boarding station, a prompt signal is issued. For example, the bus boarding assistance method of claim 7, further includes: A global positioning system (Global Positioning System, GPS) positioning information sent from the vehicle is received by the one-line control center server, and the GPS positioning information is transmitted to the vehicle server. For example, the bus boarding assistance method of claim 7, further includes: sending a reservation result to the mobile device by the vehicle server according to the GPS positioning information; Wherein, the reservation result includes a dynamic information or a bus arrival time at a boarding station. For example, the bus boarding assistance method of claim 7, further includes: Receive the GPS positioning information from the travel control center server through the mobile device, select the bus according to the GPS positioning information, and obtain a dynamic information of the bus or send the reservation message; The reservation message further includes a location of a waiting area. For example, the bus boarding assistance method of claim 7, further includes: The prompt signal is presented by the vehicle machine sending out a prompt sound through a broadcasting device, a display displaying a text message, or a lighting device sending a flashing light signal.

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