PROBLEM $3$

The superelevation profile is shown below for a spiral curve of length $600$ ft and

total pavement width of $24$ ft $.$ Normal crown slope is $0\mathrm{.}015.$ Use edesinn $=0\mathrm{.}1.$ Find

the value of $r?$ The station of the T$.$S$.$ is $177+00\mathrm{.}00.$ Assuming that the first cross

section is "Normal Crown" section, that the "Adverse Crown Removed" section is

achieved at the T$.$S$.$ station, and that the full superelevation $($or easese $=0\mathrm{.}1)$ is

achieved at the end of the spiral station S$.$C$.$ compute necessary distances and

label the following diagram clearly, you need to show:

cross sections at locations $1,2\mathrm{.}3,$ and $4.$ Sketch these as in the class notes and

examples, and make sure to mark all cross section slopes with their

correspondent numerical values. Do this for each cross section:

the location and station of the T$.$S$.$ and the location and station of the S$.$C$.$

accurately on the diagram. Also, show length of spiral on this diagram; and

all distances marked with $(?)$ question mark. Show their numerical values on

the diagram and explain how you got these numbers under the diagram.

Show your calculations below the diagram.

Please note that each item underlined above has its own grade.

Hint: This is a spiral not simple horizontal $($or circular$)$ curve.

So$,$ do not use the one third two third rule that is used in simple

circular curves.