The first Tier 1 mastery challenge for LIRR is titled 'Faster, but not too Fast' and is worded as 'Reach a maximum speed of 70mph, but do not exceed 85mph'. This makes no sense. If 70mph is the maximum then you can't go any higher, so the 85mph reference is superfluous! I believe it should say 'Reach a minimum speed of 70mph, but do not exceed 85mph'.