BS ISO 22735:2021 pdf download – Road vehicles — Test method to evaluate the performance of lane-keeping assistance systems 6.4 Environmental conditions Conduct tests in dry conditions with ambient temperature above 5 °C and below 40 °C. For some proving ground where the low limit of ambient temperature of 5 °C is difficult to achieve,lower value can be adopted. However, in that case, the lower limit values shall be reported. No precipitation shall be falling and horizontal visibility at ground level shall be greater than 1 km. Wind speeds shall be below 10 m/s to minimize VUT disturbance. Natural ambient illumination shall be homogenous in the test area and in excess of 2 000 lx for daylight testing with no strong shadows cast across the test area other than those caused by the VUT. Ensure testing is not performed driving towards, or away from the sun when there is direct sunlight. Measure and record the following parameters preferably at the commencement of every single test or at least every 30 min: — ambient temperature in °C; — wind speed and direction in m/s; — ambient illumination in lx. 6.5 Test vehicle 6.5.1 General condition The test vehicle condition shall be in accordance with the vehicle manufacturer specifications,particularly with respect to the wheel alignments, power train (e.g. differentials and locks) configuration and tyre fitment. 6.5.2 LKAS settings If different settings are available, the chosen setting shall be kept during the complete test procedure. The test procedure can be repeated for different settings if needed. NOTE The aim of this document is to measure performance of a vehicle equipped with LKAS. It is not intended to compare performance of different vehicles, such as Euro NCAP procedure. 6.5.3 Tyres Generally, all measurements shall be conducted with original fitment tyres mounted. If several types of tyres are available, the types of tyres shall be reported. For a general tyre condition, new tyres shall be fitted on the test vehicle according to the manufacturer’s specifications. If not specified otherwise by the tyre manufacturer, they shall be run-in according to the tyre conditioning procedure specified in 7.1.3. After running-in maintain the run-in tyres in the same position on the vehicle for the duration of the testing Tyres shall have a tread depth of at least 90 % of the original value across the whole breadth of the tread and around the whole circumference of the tyre....

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