civil engineering research

it should include more than one of the items listed and other items as desired: 

1)review of literature 

2)numerical analysis

3)assessment of the current state of practice

4)design methods, suggestions for improvement supported by appropriate analysis, and/or case studies as closely related as possible

Topic:

The primary objective is to document how layer coefficients (i.e. ai terms such as a1, a2, a3...have been developed). These terms are the most important inputs to determining a pavement’s available structural capacity based on the materials used. Three documents must be referenced as described below, alongside additional sources as needed

link of format : http://onlinepubs.trb.org/onlinepubs/am/infoforauthors.pdf 

Note:  (only referencing these given three documents won’t result in a good grade, they are just to get the process started). provide more references and cite them after each paragraph