You can see the equations in the attached image. I think that the first equation has CC8 and CC9 in meters per squared second, speed in kilometers per hour and delta t in seconds. The value 80 is the speed in km/hr. When multiplied by 3.6 , the units become km/hr.
But what about the second equation? If the speed is in km/hr and sn(t), CC0 and Ln-1 are all in meters then after multiplying by 3.6 the units become seconds which can't be correct.
Dear Umair,
Check if the link helps you:
http://onlinepubs.trb.org/onlinepubs/conferences/2011/RSS/3/Higgs,B.pdf
Thanks for your answer Beatrice. But the paper you linked has Wiedemann74 model, not 99.
Vincenzo Pasquale Giofré here on RG asks the same question. Check the answers he got. On google there are many images on this.
@Beatrice, I have seen Mr. Giofre's question. He asked about the mathematical formulation. My question is different. I am asking about the units of parameters.
I suspect that the second equation has delta t in the denominator instead of Un(t). Only then that equation would make sense.
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