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You would have to be given median and access point information. But if the problem statement directly calls out for a freeway I believe you need to use that equation. If you read the paragraph under the equation "Base FFS" it explains pretty well why you use 75.4. That value covers all speeds...

I'm in it right now. It seems pretty good compared to what I saw in my friends testmasters depth portion. He passed the exam last fall and said he almost exclusively used the testmasters depth book, and jumped around the MUTCD and HCM here and there.

Yea that's true. If it gave a specific % for recreational traffic then I could move from the default.

If Fp is given as 1, but the problem also states that 90% are local, with the remaining being through traffic and recreational traffic to a nearby park, do you use 1 or .9 as Fp? It didn't effect the LOS, but could if the volume was different. I used .9 since the statement gave evidence that a...

Printed! Thanks a lot. My calculator actually started giving the correct answer. But that chart is much better to use. Trial and error would waste some valuable time

And I realize you can essentially guess a critical depth and solve by trial and error, but that seems time consuming compared to equation solver on the calculator.

I am using the equation: Q^2/g=A^3/T, I am given b, water depth,Q and that it is a trapezoid. With 3:2(h:v) slopes.

This problem requires using the solve function on the calculator. My Casio fx-115ms will solve the equation, but only gives one value, when typically there are multiple answers. I cannot figure out how to show both answers. Should I expect to see an open flow problem asking for critical depth on...

Thanks. I was having calculator errors and getting different solutions. 

Why do you assume to find R based arc definition as opposed to chord?