Where [DEL]:

ϑ is the wetted track surface temperature in degrees Celsius,

a= 0.002 ℃−1 and ϑ0=20 ℃.

The temperature corrected average peak braking force coefficient (μpeak,corr) shall be [DEL] not less than 0.65 and not greater than 0.90.

 a5c0

Where "t" is the wetted track surface temperature in degrees Celsius.

The temperature corrected average peak braking force coefficient (µpeak,corr) shall be 0.7 ± 0.1.

 a3c0
Where "t" is the wetted track surface temperature in degrees Celsius. a0c0