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GB/T 47274-2026Test methods for the road test lanes and parking ramps of motor vehicle inspection agencies (English PDF)

机动车检验机构路试车道和驻车坡道检测方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 31, 2026

Implementation date

October 1, 2026

Scope

GB/T 47274-2026 is the English-translated version of 机动车检验机构路试车道和驻车坡道检测方法.

GB/T 47274-2026 specifies how the road test lanes and parking ramps of motor vehicle inspection agencies are to be tested, covering the testing equipment, conditions, methods and the handling of results.

It defines the road test lane as a lane used to road-test service braking performance. The lane and the ramp must be dry, clean and free of foreign objects, and the surface adhesion coefficient is measured at 0 to 40 degrees Celsius and at most 85% relative humidity.

The method starts with a visual inspection of the surface and the markings, then measures lane length with a total station and prism by the side-measurement method, and lane width at five sets of points along the lane.

Informative annexes give a sample record and a sample report. It was issued on 31 March 2026 and applies from 1 October 2026.

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Document preview — GB/T 47274-2026

National Standard of the People's Republic of China

ICS: 43.180
Classification: R 86

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Terms and definitions4
4 Testing equipment6
5 Testing conditions6
6 Testing methods6
7 Processing of testing results20
Appendix A (Informative) Testing record (sample)22
Appendix B (Informative) Testing report (sample)23
References24

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

Please note that certain elements of this document may be the subject of patent rights.

The issuing body of this document shall not be held responsible for identifying any such patent rights.

1 Scope

This document specifies the testing equipment, testing conditions, testing methods, handling of testing results for road test lanes and parking ramps of motor vehicle inspection agencies.

This document is applicable to the testing of road test lanes and parking ramps of motor vehicle inspection agencies.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies to this document; for undated references, the latest edition (including any amendments) applies to this document.

GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 42685-2023 Motor vehicle inspection terminology

GB/T 44411-2024 Motor vehicle inspection equipment and site adhesion coefficient detection method

3 Terms and definitions

The terms and definitions defined in GB/T 42685-2023 and GB/T 44411-2024, as well as the following terms and definitions, apply to this document.

3.1 Road test lane

A lane used for road testing and inspection of the service braking performance of motor vehicles. [Source: GB/T 42685-2023, 3.4.13, modified]

4 Testing equipment

The testing equipment is listed in Table 1.

5 Testing conditions

5.1 The road test lane and parking ramp shall be dry, clean, free of foreign objects and obstructions.

5.2 When testing the surface adhesion coefficient of the pavement, the ambient temperature shall be 0 °C ~ 40 °C, the relative humidity shall be <= 85%.

6 Testing methods

6.1 Road test lane

6.1.1 Visual inspection

The surface of the road test lane shall be level, firm, free of obvious damage. It shall be marked with lane boundary lines and test lane lines that comply with requirements, as well as necessary traffic markings; all markings shall be clear, complete, continuous.

6.1.2 Length of road test lane

6.1.2.1 Set up the total station at a point with a visible point and level the instrument.

6.1.2.2 Place the prism successively at the start and end points of one of the test lane lines; adjust the prism stand at each location so that the bubble level is centered.

6.1.2.3 Use the side-measurement method, to measure the slant distance along the direction of travel of the test lane line. A schematic diagram for the testing of the road test lane length is shown in Figure 1.

6.1.2.4 Repeat the steps in 6.1.2.2 and 6.1.2.3, to measure the slant distance along the direction of travel of the other symmetrically positioned test corridor line.

6.1.2.5 Take the minimum measured result as the length of the road test lane.

6.1.3 Width of road test lane

6.1.3.1 Along the direction of travel of the road test lane, select 5 sets of measurement points, including the start and end points. The spacing between each set of measurement points shall be approximately one-quarter of the longitudinal length of the road test lane.

See Figure 2 for the schematic diagram of the width measurement of road test lane.

Additional measurement points shall be added at locations that appear visually narrower than the rest. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 28 pages — is available in the English PDF.

Referenced standards

Normative references

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