What is the identification of emergency phones on highways?

[VonAlice]

Highway emergency phones are marked with a black telephone inside a dark green square frame. Below is a partial introduction to emergency phones: 1. On highways, emergency phones are installed at regular intervals for requesting towing in case of vehicle breakdown or reporting accidents. It is a dedicated line that only connects to the highway traffic command center. 2. No dialing is required for use. There is a button on the phone panel - simply press it with your index finger, release after a moment, and you can communicate with the traffic command center. Before speaking, confirm your location's kilometer marker, time, general vehicle malfunction details, or accident scale and casualties to facilitate coordinated arrangements by relevant departments.

[OPeter]

I've seen too many emergencies on highways. The emergency call signs are actually very easy to spot: they're yellow rectangular signs with a clear black telephone handset symbol printed on them, and the words "Emergency Call" written in large characters below. These signs are usually mounted on roadside guardrails or standalone posts, with a conspicuous marker every kilometer. They're particularly visible when driving at night because they're designed with reflective materials. When you need rescue assistance, simply press the call button to directly connect to the monitoring center - much more convenient than using a mobile phone to report your location. I once witnessed a car accident where the victims were quickly rescued thanks to this system. Remember to pull over, turn on your hazard lights, and place a warning triangle 150 meters behind your car before using the emergency phone for safety.

[DiPiper]

Veteran drivers who frequently travel on interprovincial highways are all familiar with that small yellow sign. Emergency call signs are uniformly made with engineering-grade reflective film, featuring a telephone icon and text in black on a yellow background, all positioned at the driver's eye level. They are installed on guardrail posts and come with serial numbers, ensuring each emergency point is traceable. These devices are networked across the national highway system, displaying the exact mileage marker the moment the call connects. Once, when I was rushing a critically ill patient to the hospital, I guided the ambulance by counting the call sign numbers along the way. The system automatically activates hands-free mode, allowing drivers to stay safer without fumbling for their phones.

[LondonRose]

On long-distance trips, these safety facilities are what I pay the most attention to. Emergency call signs are typically the size of an A4 sheet, with a bright lemon-yellow background and bold black phone icons, clearly visible from up to 500 meters away. The placement is carefully planned: one every two kilometers on flat sections, every kilometer on mountainous curves, and one at the entrance and middle of tunnels. Each device is equipped with solar charging panels, ensuring operation even in windy or rainy conditions. Last month, when I was trapped in a heavy rainstorm with no phone signal, the emergency call button directly connected me to the command center. Remember to stay half a meter away from the microphone during the call, as wind noise can affect the operator's judgment.

[OAddyson]

As a vehicle rescue volunteer, let me share some practical tips. That iconic yellow phone sign is vertically installed at 1.5 meters height to avoid being buried by snow. The icon is nationally certified, even colorblind drivers can recognize it by the pattern. Key sections are equipped with night guidance lights that flash in rain/fog to indicate location. The device has built-in anti-interference system - press the button firmly until green light appears. Once saw a malfunctioning sign during accident response, recommend reporting damages immediately for repair. This system is 10x more efficient than regular phones, especially suitable for elderly and out-of-town drivers.