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Hope everyone are studying well. I know every one must be busy at this time, but I cant help posting this question just to see if I can get a reply. Well, the green book consists of a bunch of superelevation tables. I think I understand exhibit 3-15, which is straightforward since it has...

I am taking geo breadth only, and I am not sure how in depth I have to go in regard of the bearing capacity equations. Since the bearing capacity factors are varying and are not consistent I am getting different results. Also the shape and depth corrections given in lindeburg are limited when...

I am not able to figure out how to use charts to arrive at normal depth for open channel problems with a circular cross section. I am able to use the chart in Appendix 19-C and table 19.3 in CERM to arrive at Q/Qfull, but I am kind of stuck in there. Should I be just using the mannings...

I cannot reach at a valid answer, may be my reasoning is flawed. Here is how I tried to solve it: 1) I thought that Q is asking for B/C ratio of the alternative to the B/C ratio of the original 2) The output and revenue are the same, which means the benefits are the same, thus cancel out...

It would be really appreciated if some one can help me solve this problem. I converted the values into NPV, taking into account the difference in main. cost after 15 years. I arrived at at a total of $261,266.36 for the NPV and divided it by 25 to get the annual costs. But I don't think the...

If any one can solve this problem, it would be really nice and much appreciated.

Hello group, Would some one please clarify my question about when to use what formula for determining length of the spiral curve. CERM on page 78-18 gives (1.6*V^3/R) formula where as Green book on page starting 188 gives different criteria for calculating minimum lengths for the spiral curve...

I came across the following Question and kind of depressed that I couldn't solve the problem. It appears to be easy Problem 5: Transportation [E0304210006] 
For a four-lane freeway with a 60 mph design speed and an average travel speed of 45 mph, what is the expected maximum flow rate (pcphpl)...

I know the formula for calculating Space mean speed is pretty straight forward, but I am getting confused by the calculation shown in HCM. If you look at page 7-3 in the end the SMS is supposed to be 38.298, I cannot understand how HCM has arrived at 25.5 mi/h. I used nL/ (sum of travel...