Supplied Standards Strategy

While the NCEES PE Civil Reference Handbook covers the foundational math and physics, the PE Civil Transportation exam requires you to navigate a vast library of specialized, discipline-specific design manuals. These are referred to as the “Supplied Standards.”

In the CBT environment, these standards are provided as searchable PDFs on the left side of your monitor. You do not need to memorize the tables within them, but you must instantly know which standard to open when reading a problem statement.

The “Alphabet Soup” of Transportation Standards

Below is the mapping of common problem themes to the specific standard that governs them. Memorize this mapping. Opening the wrong 800-page manual will drain your time bank.

1. AASHTO GDHS (The Green Book)

A Policy on Geometric Design of Highways and Streets Use this for:

  • Design values for sight distance (Stopping, Passing, Decision, Intersection).
  • Superelevation design tables and runout/runoff lengths.
  • Freeway and interchange geometric criteria (ramp widths, acceleration/deceleration lanes).
  • Grade limits and climbing lanes. Key Trap: Do not use the Green Book for operational analysis (like Level of Service). The Green Book is for the physical geometry and design of the road.

2. HCM (Highway Capacity Manual)

Use this for:

  • Operational Analysis: Level of Service (LOS), capacity, and delay.
  • Free-Flow Speed (FFS) calculations.
  • Weaving segments, merge/diverge areas on freeways.
  • Signalized and unsignalized intersection delay and capacity. Key Trap: The HCM is massive. Rely heavily on the chapter flowcharts to find the correct lookup table (e.g., base free-flow speed adjustments).

3. MUTCD (Manual on Uniform Traffic Control Devices)

Use this for:

  • Signage (dimensions, colors, placement).
  • Striping and pavement markings.
  • Traffic Signal Warrants (the 9 warrants).
  • Temporary Traffic Control (TTC) / Work Zone layouts and taper lengths. Key Tip: The MUTCD is highly visual. Use the bookmarks to jump to the “Temporary Traffic Control” chapter for taper formulas.

4. HSM (Highway Safety Manual)

Use this for:

  • Predictive safety analysis, crash frequencies, and Crash Modification Factors (CMFs).
  • Empirical Bayes method. Key Tip: Questions on the HSM are usually highly procedural. Look for keywords like “predicted average crash frequency” or “CMF.”

5. AASHTO MEPDG & 1993 Pavement Design Guide

Use this for:

  • Flexible (asphalt) and rigid (concrete) pavement design.
  • Structural numbers (SN), ESAL calculations, reliability, and serviceability.
  • Dowel bar and tie bar spacing.

6. PROWAG (Public Right-of-Way Accessibility Guidelines)

Use this for:

  • ADA compliance, pedestrian pathways, wheelchair ramps, curb cuts, and crosswalk dimensions. Key Tip: PROWAG questions are often “point-and-click” or simple true/false bounds (e.g., “maximum cross slope is 2%”).

The Golden Rules of Standard Navigation

1. Read the Ask Before Opening a PDF

Do not open a standard just because a problem mentions a road. Read the final sentence (the “Ask”).

  • If it asks for the length of a taper, open MUTCD.
  • If it asks for the required radius, open the Green Book.
  • If it asks for the density of traffic, open the HCM.

2. Use the Index and Bookmarks

When searching the Green Book or HCM, text searching (Ctrl+F) can be overwhelming because terms like “lane width” appear thousands of times. Instead, use the PDF bookmarks to jump to the specific chapter (e.g., HCM Chapter 12: Highway Segments), or scroll to the standard’s Index, find the term, note the page number, and jump directly there.

3. Beware of Overlapping Terminology

Some concepts appear in multiple standards, but they serve different purposes:

  • Sight Distance: The NCEES Handbook has the basic formula. The AASHTO Green Book has the design tables. The MUTCD has sight distance considerations for sign placement. Always let the context of the question dictate the manual. If the question is about laying out a new curve, use AASHTO. If it’s about placing a warning sign, use MUTCD.

Study Application

When practicing problems, keep a tally of how many times you open the wrong standard. If you frequently confuse the HCM and the Green Book, spend an hour reviewing the Table of Contents of both manuals to cement the difference between “operations” (HCM) and “geometry” (AASHTO).