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

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 Level of Service (LOS) A through F provides a qualitative grade for traffic conditions.

- The correct formula for Peak Hour Factor (PHF) and how to apply it to find the design flow rate.

- How to use Passenger Car Equivalents (PCEs) to account for the impact of heavy vehicles on capacity.

- Common exam traps, such as inverting the PHF formula or misapplying the heavy vehicle adjustment factor.

- Key factors that reduce a highway's free-flow speed, including lane width and lateral clearance.

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

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:

- The fundamental relationship of traffic flow is q = u·k, where q is flow (veh/hr), u is speed (mph), and k is density (veh/mile).

- The Greenshields model provides a linear relationship between speed and density: u = u_f(1 − k/k_j), where u_f is free-flow speed and k_j is jam density.

- Roadway capacity, or maximum flow (q_max), occurs precisely when speed is half the free-flow speed (u_f/2) and density is half the jam density (k_j/2).

- A common exam trap involves recognizing that a single flow rate (other than capacity) can correspond to two different traffic states: one uncongested (high speed, low density) and one congested (low speed, high density).

- Use the mnemonic "Max flow is at half and half" to quickly solve for roadway capacity without complex derivations.

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

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:

- A mass diagram plots cumulative earthwork, where rising slopes mean cut and falling slopes mean fill.

- Balance points on the diagram show where the total cut equals the total fill between two stations.

- The difference between free haul (cost included in excavation) and overhaul (paid separately for longer distances).

- How to apply the shrinkage factor to calculate the required bank volume from a specified compacted fill volume.

- The definition of swell factor and its application in determining hauling capacity for loose soil.

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

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 correctly apply the K-Value formula (L = K*A) to determine the required length of a vertical curve.

- The key design difference between crest curves (stopping sight distance) and sag curves (headlight sight distance).

- How to calculate 'A', the algebraic difference in grades, and avoid the common exam trap of using decimals instead of percentages.

- The precise formula to locate the high or low point of a curve and why it's rarely at the midpoint.

- A memorable mnemonic to distinguish between the primary design criteria for crest and sag curves.

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

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:

- The difference between the arc and chord definitions for Degree of Curve, and which to expect on the FE Exam.

- The correct formula to calculate the Tangent Length (T) and its role in locating the PC and PT from the PI.

- The critical mistake to avoid when calculating the PC station: always subtract the tangent length from the PI station (PC = PI - T).

- Why you must convert the intersection angle (delta) from degrees to radians when calculating the curve length (L).

- The complete, step-by-step stationing process from a given PI to the final PT station (PT = PC + L).

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

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 the Stopping Sight Distance (SSD) formula from the NCEES FE Reference Handbook.

- The critical sign convention for positive (uphill) and negative (downhill) grades in SSD calculations.

- The purpose of superelevation in horizontal curve design and how to use the point-mass formula.

- How to balance superelevation (e) and side friction (f) based on design speed and curve radius.

- A simple mnemonic, "Uphill is a plus," to remember the grade sign convention for SSD.

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

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 differentiate between at-rest (K_0), active (K_a), and passive (K_p) lateral earth pressures and select the correct formula.

- A mnemonic to remember that active pressure (wall moves Away) is smaller than passive pressure (wall Pushes).

- How to apply Terzaghi's ultimate bearing capacity equation and find the N-factors in the NCEES Handbook.

- The most common exam trap for bearing capacity calculations: inconsistent units for soil weight and footing dimensions.

- Why slope stability questions on the FE exam focus on the conceptual Factor of Safety rather than complex calculations.

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

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 the Mohr-Coulomb failure criterion for different soil types on the FE Civil exam.

- The critical difference between drained (effective stress) and undrained (total stress) analysis for clays.

- Why the friction angle is considered zero in an undrained analysis of saturated clay.

- How to determine undrained shear strength (c_u) from an unconfined compression test result (q_u).

- How triaxial test results (σ₁ and σ₃) are used to find the shear strength parameters c and φ.

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

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 calculate the total primary consolidation settlement using the Compression Index (Cc) formula.

- The critical importance of correctly calculating initial and final effective vertical stresses at the clay layer's midpoint.

- How to use the time factor (Tv) equation to determine how long it will take to reach a certain percentage of consolidation.

- The most common exam trap: identifying one-way versus two-way drainage to find the correct drainage path length (H_dr).

- Key benchmark values for the time factor, such as Tv = 0.197 for 50% consolidation, which frequently appear 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