New Japan-Oriented International Standards Issued for Road-Boundary Departure-Prevention Systems for Traveling Vehicles
An effort aiming to achieve a society with no traffic accidents
October 2, 2018
In response to Japan’s proposal, the International Organization for Standardization (ISO) issued new international standards (ISO 19638) for systems for preventing road boundary departures by traveling vehicles. In case that a traveling vehicle is in danger of unintentionally leaving the road due to driver carelessness, the systems control both steering and braking to prevent traffic accidents from occurring.
This issuance is expected to contribute to popularizing vehicles on the market with such built-in prevention and safety capabilities and to decreasing the number of traffic accidents caused by road boundary departures.
According to the data on fatal traffic accidents collected by the National Policy Agency and categorized by accident criteria, the number of traffic accidents between vehicles has reached its highest mark, followed by the number of traffic accidents between vehicles and pedestrians and the number of single-vehicle accidents. Vehicles leaving the road unintentionally (road boundary departures) represent a significant proportion and number of the causes of fatalities in these accidents. These accidents caused by road boundary departures include cases in which vehicles drifted into the on-coming traffic lane and caused a head-on collision, vehicles drifted from road boundaries onto sidewalks and hit pedestrians, and vehicles that drifted from road boundaries and collided, with objects located beside the road.
To address these situations, automobile industries around the world have been embarking on commercializing vehicles with built-in devices that more effectively prevent such accidents and mitigate the damage caused by them. To further popularize these efforts, Japan proposed to the ISO the establishment of new international standards governing means for stipulating the requirements for these devices and confirming their capabilities.
2. Outline of the international standards
The newly-issued ISO 19638* (road boundary departure prevention systems: RBDPS) defines standards concerning systems which effectively avoid traffic accidents by reducing kinetic energy in case that a traveling vehicle is in danger of road boundary departures (see Figure below).
For this purpose, the new international standards highlight the stipulation of test methods for evaluating performance requirements for related devices and performance of multiple controls incorporated in the steering directions and the direction of travel (braking) of a vehicle.
In June 2015, the Society of Automotive Engineers of Japan, Inc. (JSAE) submitted a proposal for new standards to ISO / TC204 (intelligent transport systems) / WG14 (vehicle/roadway warning and control systems), in which Japan serves as the secretariat. In response, on August 30, 2018, the ISO finally issued the new standards.**
Figure: Conceptual picture of an RBDPS under operation
3. Expected effects
This new international standardization will contribute to the worldwide popularization of vehicles with built-in, high-performance safety systems for preventing traffic accidents and to a decrease in the number of fatal traffic accidents, thereby successfully decreasing the number of casualties caused by traffic accidents by half globally by 2030, the target year set in the Sustainable Development Goals policy upheld by the United Nations.
*1. Official title of the new international standards:
Intelligent transport systems - Road boundary departure prevention systems (RBDPS) - Performance requirements and test procedures
**2. This successful standardization effort is partly due to the use of the Expenditures for the Strategic Development of International Standards Project for Rational Energy Use (international standardization for fundamental technologies for autonomous driving systems and establishment of bases for popularization of these standards), which METI has commissioned to a private entity. In addition to these new standards, Japan has been exercising leadership in other related ISO activities (e.g., those for partially automated lane-changing systems).
Division in Charge
International Standardization Division, Industrial Science and Technology Policy and Environment Bureau