1. Status of discussion about “Reversing Motion”
in VRU-Proxi IWG and liaison with GRSG
Chair of TFRWS
Written in reference to GRSG e and GRSG , subject to change depending on further discussion.

2. VRU-Proxi Informal Working Group
Working contents
Forward motion
Vehicle turning - Blind Spot Information System (Oct.2018, 115th GRSG)
Vehicle driving straight or taking off from standstill (Apr.2020, 118th GRSG)
Reversing motion
New field of view for behind vehicle (Apri.2019, 116th GRSG)
　　* Introduction Today>To be discussed by a TF to be established under IWG,
chaired by Japan.
Direct Vision
Evaluation of direct vision around vehicle from driver (Apr. 2021, 120th GRSG)

3. Purpose
To provide driver vision for safety of vehicle rear direction when the vehicle moving rearward.
In order to achieve the purpose, " Close-proximity rear" view devices (Class VIII) was added to current R-46.
New UNR
“ Close-proximity rear" view devices (Class VIII)
The contours of the reflecting surface shall be of simple geometric form and its dimensions such that the mirror provides the field of vision specified in paragraph of this Regulation." “
Regarding Class VIII devices can be accepted Camera monitor systems (or other devices)."
Scope
All categories of M and N.

4. Definitions of Class VIII Field of View
The field of vision shall be bounded by the following planes and shall be such that the driver can see at least part of each cylindrical objects with a height of 1,000 mm and a diameter of 300 mm which is located at 6 positions within the boundaries of the field of vision as defined in Figure:
(a) A transverse vertical plane of the outermost point of the rear of the vehicle;
(b) A transverse vertical plane [3,500] mm behind the outermost point of the rear of the vehicle;
(c) Two longitudinal vertical planes parallel to the longitudinal vertical median plane of the outermost point of the side of the vehicle.

5. Multimodal approach for Class VIII Field of View
Driver can be perceived Class VIII Field of View by;
Direct vision from newly defined driver’s looking back ocular points
Indirect vision
Combination of mirrors of Class VIII or other Class(es)
Camera monitor system
Obstacle detection systems (e.g. Sonar system) “
If the field of vision defined in paragraph can be perceived via a combination of devices for indirect vision of other Classes or directly from the driver’s looking back ocular points described in , it is not mandatory to equip the vehicle with a Class VIII close-proximity rear-view device. In addition, the requirement may be met using a combination of mirrors of Class VIII and other Class(es) or using an obstacle detection system." “
The driver’s looking back ocular points” means two points located at 96mm longitudinally rearward, 158mm horizontally inside vehicle center and 6mm vertically above from “The driver’s ocular points” described in 12.1.

6. Further discussions - Style of regulation Option 1 R46 Amendment
Option 2 New regulation>For the current proposal, see GRSG
Option 3 Some parts in R46 Amendment and the other parts in new regulation
- Details
For sensor detection, if necessary or not to distinguish VRU and other obstacles
Rear headrest position setting
Suitable rear-end distance, 3.5m or other distance
Scope for application or exception
Transitional provisions

7. Test items Camera monitor system (CMS) Class VIII field of vision
Displayed object size for CMS of Class VIII
Requirement about installation
The smallest discernable detail of the naked eye shall be defined according to standard ophthalmologic tests like the Landolt C test or the Triangle Orientation Discrimination (TOD) test.
Detection system
Detection latency test method
Test method for detection of the test objects for Class VIII field
Minimum detection rate for the rear horizontal area
Class VIII field

8. Test conditions for Class VIII field of vision
Requirements.
(a) for the test objects in the first row (Test object A, B, and C);
0.15 m x 0.15 m area or top of the test object should be seen to at least at one position on each test object m x 0.15 m area can be replaced to at least 3 bands 0.05 m apart continuously on each test object.
(b) for the test objects in the second row (Test object D, E, and F) and the third row (Test object G, H, and I);
Whole height of the test object should be seen.
Test object location
Test object
(Ref. GRSG )

9. Test Methods and Safety Provisions for Detection Systems
Detection latency test method
The detection latency as measured according to paragraph 4.2. shall not exceed 0.6 sec.
One test object is used. The distance from the rear edge to the test object and the position of the test object are selected by the manufacturer to ensure the detection of the test object. The test object shall be located in the detectable grids within the rear horizontal area.
(a) With the vehicle being in the initial state, locate the test object behind the vehicle and select the reverse gear.
(b) Measure the elapsed time (detection latency) from the moment at which the reverse gear is selected as specified by the manufacturer of the vehicle to the moment at which the audible warning starts.

10. Test Methods and Safety Provisions for Detection Systems
Test method for detection of the test objects for Class VIII field of vision
Test object is put on each point as shown in below figure. Audible warning systems shall detect each test object and provide warning signal. The test object shall be defined the pole as [300] mm diameter, [1] m height and [hard plastic] material.
When the warning provided more than [five] seconds continuously, it is judged as test object is detected.
1.0m detection is compatible with the CMS requirement based on the results of Japanese studies. (VRU-Proxi-08-11)
(Ref. GRSG )

11. Test Methods and Safety Provisions for Detection Systems
Minimum detection rate
The minimum detection rate required for the rear horizontal area shall be as follows:
(a) 90 percent for A1 as defined in paragraph of ISO 17386:2010;
(b) 87 percent for the rear-2 range in A2 as defined in paragraph of ISO 17386:2010.
There shall be no undetected hole larger than a square consisting of two-by-two grids.
When the warning provided more than [five] seconds continuously, it is judged as test object is detected. The detection test shall be performed [one] time for each test object. However, if necessary, according to the agreement of Technical Service and manufacturer, it can be judged as the test object is detected in case that warnings are provided in [four] tests out of [five] tests.
e.g. w_r=1.74 m
(Ref. GRSG )

12. Test Methods and Safety Provisions for Detection Systems
Minimum detection rate (con't)
Here, the rear horizontal area test procedures shall be as per paragraph 7.3. of ISO 17386:2010.
When the warning provided more than [five] seconds continuously, it is judged as test object is detected. The detection test shall be performed [one] time for each test object. However, if necessary, according to the agreement of Technical Service and manufacturer, it can be judged as the test object is detected in case that warnings are provided in [four] tests out of [five] tests.
(Ref. VRU-Proxi-04-03)

13. Coordination with GRSG
At the meeting of GRBP held in January, TFRWS made a status report and the chair proposed doing further work in coordination with GRSG.
At the meeting of GRSG held in April, Switzerland reported on the status report made by TF at the previous meeting of GRBP.
The expert from Switzerland reported on the recent meeting of the Task Force (TF)
on reverse warning issues under the Working Party on Noise and Tyres (GRBP) (GRSG ). He added that TF had proposed amendments on a "pause switch" for reverse warning sound devices which would be permitted if other safety devices (e.g. camera monitor systems) were activated. GRSG welcomed the information and agreed on the need to coordinate this subject between GRBP and GRSG to avoid overregulation of these devices.
The Chair invited IWG on awareness of Vulnerable Road Users proximity in low speed manoeuvres (VRU-Proxi) to further consider this subject and to report back to GRSG at its next session in October 2019.
(ECE/TRANS/WP.29/GRSG/95)