Lindsay Acceleration/Deceleration Highway Question

There is a part in Lindsay, where you go from 20km to 80km, and then speed drops to 60km very quickly and from I understand you are asked to merge left, in 80km, slow down to 60km and merge again to the right. If you can't merge safely at 80km, and can only do after 60km do you fail?

https://www.youtube.com/watch?v=xNAO_1j37lw&start=619