British Standards Document
BS ISO 4138
Passenger cars. Steady-state circular driving behaviour. Open-loop test methods

https://doi.org/10.3403/30426364U

BS ISO 4138 is maintained by AUE/15. The current release of this standard is:

BS ISO 4138:2021 Passenger cars. Steady-state circular driving behaviour. Open-loop test methods

https://doi.org/10.3403/30426364 (published 12/10/2021)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS ISO 4138:2012 [current until 12/10/2021]
BS ISO 4138:2004 [current until 31/08/2012]