- Transportation Depth Reference Manual for the Civil PE Exam
- PPI Transportation Depth Six-Minute Problems for the PE Civil Exam, 7th Edition –– Contains 91 Practice Problems for the PE Civil Exam
- PPI Transportation Depth Reference Manual for the PE Civil Exam, 3rd Edition – A Complete Reference Manual for the NCEES PE Civil Transportation Exam
- Six-Minute Solutions for Civil PE Transportation Depth Exam Problems
- Six-Minute Solutions for Civil PE Exam Transportation Problems







