FE Civil Exam Prep 77, Signal Timing and Pavement Design

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - How to apply Webster's optimal cycle length formula, C₀ = (1.5L + 5)/(1 − Y), for signal timing problems. - The critical distinction between the 'Y' for the sum of critical flow ratios and the 'Y' for the yellow interval calculation, a common exam trap. - The purpose of the AASHTO Structural Number (SN) in representing the overall strength of a flexible pavement. - How to solve for a required layer thickness (D) using the formula SN = a₁D₁ + a₂D₂m₂ + a₃D₃m₃. - The importance of including drainage coefficients (m₂ and m₃) for base and subbase layers, a frequent source of error on the exam. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep