GB/T 43407.2-2023 English PDF (GBT43407.2-2023)

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GB/T 43407.2-2023: Road vehicles -- Ergonomic requirements for the driver’s compartment in low-floor line-service buses -- Part 2: Visibility
GB/T 43407.2-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.20
CCS T 42
Road Vehicles - Ergonomic Requirements for the Driver’s
Compartment in Low-floor Line-service Buses - Part 2:
Visibility
视野
(ISO 16121-2:2011, Road Vehicles - Ergonomic Requirements for the Driver’s
Workplace in Line-service Buses - Part 2: Visibility, MOD)
ISSUED ON: DECEMBER 28, 2023
IMPLEMENTED ON: APRIL 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Requirements for Visibility ... 7
4.1 Forward Visibility ... 7
4.2 Lateral Visibility ... 8
4.3 Upper Visibility ... 9
4.4 Passenger Compartment’s Visibility ... 10
4.5 Requirements for Reflection ... 10
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This document is Part 2 of GB/T 43407 Road Vehicles - Ergonomic Requirements for the
Driver’s Compartment in Low-floor Line-service Buses. GB/T 43407 has issued the following
parts:
---Part 1: General Description and Basic Requirements;
---Part 2: Visibility;
---Part 3: Information Devices and Controls;
---Part 4: Compartment Environment.
This document modifies and adopts ISO 16121-2:2011 Road Vehicles - Ergonomic
Requirements for the Driver’s Workplace in Line-service Buses - Part 2: Visibility.
In comparison with ISO 16121-2:2011, the structural adjustments are as follows:
---3.1 in ISO 16121-2:2011 is deleted, and 3.1 and 3.2 in this document correspond to 3.2
and 3.3 in ISO 16121-2:2011;
---4.1.1 and 4.1.2 in this document correspond to 4.1.1 in ISO 16121-2:2011, and the
“NOTE” to 4.2.2 correspond to 4.2.2.3 in ISO 16121-2:2011;
---4.3.1, 4.3.2, 4.5.1 and 4.5.2 are added.
In comparison with ISO 16121-2:2011, the technical differences and the reasons for these
differences are as follows:
---The normative reference GB/T 43407.1-2023 is used to replace ISO 16121-1 (see
Chapter 3 and Chapter 4), so as to adapt to the technical conditions of China and
enhance the operability;
---The term “low-floor” and its definition are deleted (see 3.1 of ISO 16121-2:2011), so as
to avoid duplication of definitions;
---The normative reference of GB 15084 is added (see Chapter 4), so as to adapt to the
technical conditions of China and enhance the operability;
---The requirement that “the diameter of the circular rod shall be less than or equal to 20
mm” is added, and meanwhile, the determination method for the visibility area is added
(see 4.1), so as to facilitate the detection of the forward visibility. At the same time, the
relevant requirements for the lower viewing angle of buses and the normative reference
Road Vehicles - Ergonomic Requirements for the Driver’s
Compartment in Low-floor Line-service Buses - Part 2:
Visibility
1 Scope
This document specifies the requirements for the driver’s visibility in front of the buses, at the
entrance and exit toward the driver’s seat, and in the interior passenger compartment area.
This document is applicable to the design of the driver’s compartment of Category-M3 low-
floor line-service buses with a width greater than 2.30 m. Other buses may take this as a
reference.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 13053-2008 Bus Inner Dimensions
GB 15084 Motor Vehicles - Devices for Indirect Vision - Requirements of Performance and
Installation
GB/T 43407.1-2023 Road Vehicles - Ergonomic Requirements for the Driver’s Compartment
in Low-floor Line-service Buses - Part 1: General Description and Basic Requirements (ISO
16121-1:2012, MOD)
3 Terms and Definitions
What is defined in GB/T 43407.1-2023, and the following terms and definitions are applicable
to this document.
3.1 vision point V1
Within the driver’s seat point-H adjustment range defined in GB/T 43407.1-2023, when the seat
is adjusted to the final and highest positions, the point located 635 mm vertically above the seat
point-H (see the definition in GB/T 43407.1-2023).
3.2 vision point V2
1---passenger door;
2---driver’s seat point-H adjustment range defined in GB/T 43407.1-2023;
3---alternative area equipment, such as: mirrors and video surveillance systems, etc.;
4---the circular straight rod specified in 4.1.1.
Figure 1 -- Front Visibility
4.1.2 Detection method
When checking this item, regardless of the obstruction caused by the steering wheel to the
cross-bar, the determination method for the visibility area shall be carried out in accordance
with the relevant stipulations of GB 15084.
4.2 Lateral Visibility
4.2.1 Requirements
If there is a passenger door in front of the front axle, then, the driver shall be able to see at least
3/4 of one side of a cube with overall dimensions of 100 mm  100 mm  100 mm placed at
the position of the passenger door at a height of 800 mm from the ground through direct or
indirect visibility.
4.2.2 Detection method
4.2.2.1 When the passenger door is open, place the cube in 4.2.1 at the foremost end of the
passenger door area. The upper and lower planes of the cube are parallel to the ground, and its
lower plane is located at a height of 800 mm from the ground. The front end surface depends
on the rear edge (including sealing tape) of the front door frame of the passenger door, the side
surface is parallel to the vehicle’s longitudinal symmetry plane, and the inner side depends on
the outer edge (including sealing tape) of the front door frame of the passenger door (see Figure
2).
4.2.2.2 Respectively observe the cube placed in accordance with 4.2.2.1 from vision point V1
and vision point V2 (see 4.1.1) through direct or indirect visibility and measure the area of each
face of the cube that can be observed. The determination method for the visibility area shall be
carried out in accordance with the relevant stipulations of GB 15084.
NOTE: for vehicles equipped with position-adjustable dashboard, when detecting in accordance
with the requirements of 4.1 and 4.2, place the dashboard in the middle position specified
by the manufacturer.