Social Value
Technology-assisted
accident prevention
In the past, when a sudden accident or congestion occurs ahead, it was common that drivers turn on the hazard lights to deliver a message of alarm to the car behind. However, this kind of "warm gesture" is hard to find today, and it is sad to see that many accidents happen due to lack of attention of drivers without keeping their eyes on the road ahead. To replace this "warm gesture" of the past days when drivers used to notify some dangerous and emergency situations on the road by turning on the hazard lights, we are doing our best to find the best way to deliver the information of occurrence of accidents or unexpected events, in the most precise and rapid manner.
Q.
How did V2X * service start?
In 2017, starting with notification service to deliver to cars within 1km behind by recognizing sudden stop of a car ahead, we began to commercialize "T map's V2X realtime notification message on traffic safety." Afterwards, we commercialized message notification to help cars within 2km ahead yield for the ambulance or emergency vehicle struggling to save lives. Currently, 13 types of T map V2X notification are available. Our commercialization has gone through months of thorough verification after resolving the possible problems such as a message delivered to wrong cars, or delayed or repeated messages, because excessive messages can distract attention or interrupt driving.
* V2X(Vehicle-to-Everything):
Technology that passes information among various entities, e.g. from a vehicle to
another vehicle or from a vehicle to pedestrians
* T map's V2X realtime notification message on traffic safety from the initial stage
Q.
On which technology does V2X
service count?
To make V2X service available, it is necessary to identify the car behind or ahead located in the same direction as the car that made sudden stop among hundreds of thousands of cars running on the road. For the purpose of this, T map developed technology based on realtime management by creating millions of geographical groups according to the driving direction and location of cars. Regarding notification of sudden stop, we developed technology capable of delivering a message by selecting cars which receive the message in a tremendously short time, with less than 80ms on average for an inter-vehicle message, an less than 10ms except external delay. It is indispensable to cooperate with institutions expert in road situations, because precision decreases when if the information of situations occurred on the road is collected with restriction only from T map users. The institutions also agreed that the method of immediate message delivery to cars by App would be a lot more effective than by radio or electronic display board. Thus, T map was able to receive information on dangerous situations and emergency vehicles from several institutions. We developed technology of delivering information received from Korea Expressway Corporation, National Emergency Management Agency and Seoul Metropolitan Government to T map users. We are proud to say that this technology made it possible to notify drivers 1km prior to tunnel access when some accident takes place inside the tunnel of expressway.
Q.
In which specific situations
has T map V2X been used?
In May of 2020, on Jungbu Naeryuk Expressway, two people were killed by a chain collision involving six vehicles. How do you think T map users reacted with emergency stops when the accident happened? According to the internal data analysis, 72 cases of significant emergency stops were registered during 30 minutes from the moment of accident. For 5 minutes immediately after the accident, 23 cases of significant speed reduction were observed within 500 m from the accident spot, with mean speed of 14.06km/s, and emergency stops of 47km/s. 10 minutes after the accident, 22 cases of emergency stops happened within 1km from the accident spot, with mean deceleration of 9.78km/s. 15 minutes after the accident, 11 cases of emergency stops occurred within 2km from the accident stop, with mean deceleration of 8.16km/s. This means that consecutive deceleration is made within a specific period in the same section. We can see that drivers recognized the accident situation thanks to T map V2X.
Distribution of emergency stop log
related to collision accident inside
Chujeom Tunnel occurred in May of 2020
(bound for Changwon, data record of 15 minutes posterior to the accident)
Number of
emergency stop
1 ~ 3
4 ~ 6
7 ~ 9
10 ~ 12
Q.
How will V2X
influence our society?
T map's V2X realtime notification message on traffic safety sends a notification message to users once any danger of accident is detected. Even though they are designed for assuring safety, the overloaded messages can interrupt driving instead of preventing the dangerous events. For this reason, we constantly analyze and manage data to sort only significant messages. The operation of T map's V2X realtime notification message on traffic safety based on statistical data contributed to improving social safety. Furthermore, it was recognized as technology representing social values of SK Group.
Number of messages
of dangerous events for the
past three months
and amount of messages delivered to T map users
| Emergency stop notification |
Ambulance notification |
Road hazard notification (*Accident, falling objects, stopped car ect) |
|
| Number of detections by T map |
4,310,605 | 10,164 | 386 |
| Number of message delivered to T map users |
17,199,748 | 91,413 | 55,342 |
* T map’s V2X realtime notification message on traffic safety from the initial stage
Q.
How will V2X technology change our future?
When T map V2X technology is not applied and an accident arises, it takes about 20 minutes to deliver the situation to drivers. Based on data analysis of accidents, T map is carrying out active research of advanced service technology to prevent accidents and save lives by making a quick analysis of important situations such as traffic accidents and black ice (clear ice) for accurate and prompt delivery of the relevant information. In addition, we will make an effort to provide an optimal environment where as many people as possible can drive safely, counting on our open API allowing not only navigations of other companies but also external partners to use in an unrestricted manner.
T map Trend Map 2020
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