Jason, Having been in Laramie two years ago for my niece's wedding, I think that Wyoming is factoring in a couple things that would account for the extra distance. One is gawking time for the scenery and the other is tail wind.
Sorry I know you were looking for real help but I couldn't resist. 
This is clipped out of the Florida CDL Handbook 2014, current edition:
also because in Florida memorizing one chart is just not enough
A CDL is required to drive any of the following vehicles:
Sorry for the late response. I get what you're saying but the Cowboy state isn't for everyone lol. Just be careful by elk mountain.
Jason, Having been in Laramie two years ago for my niece's wedding, I think that Wyoming is factoring in a couple things that would account for the extra distance. One is gawking time for the scenery and the other is tail wind.
Sorry I know you were looking for real help but I couldn't resist.
Thanks Bill, that's what the Wyoming, Colorado and Texas books all have too.
This is clipped out of the Florida CDL Handbook 2014, current edition:
A CDL is required to drive any of the following vehicles:
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I got a question about the stopping distance. High road says perception is 3/4 seconds. At 55 mph, you travel 60 feet in 3/4 second. The Wyoming book says 1 3/4 seconds. At 55 mph this accounts for 142 feet.
High road says, Braking distance is the distance it takes to stop once the brakes are applied. At 55 mph on dry pavement with good brakes, it can take a heavy vehicle about 170 feet and about 4 1/2 seconds to stop. The book says at 55 mph it takes about 216 feet.
High Road says Total stopping distance - At 55 mph it will take about 6 seconds to stop and your vehicle will travel the distance of a football field (60 + 60 + 170 = 290 feet). The book says at 55 mph, your vehicle will travel a minimum of 419 feet.
I guess what I'm wondering and what has just confused me, do other states have different readings. Do the tests very from state to state?