The PE Civil Transportation exam gives you access to 9 discipline-specific reference standards plus the NCEES PE Civil Reference Handbook—thousands of pages of design tables, formulas, and procedures delivered as searchable PDFs on your exam computer. Knowing how to navigate these documents quickly is just as important as knowing the engineering content. Candidates who waste 3–5 minutes hunting for the right table on every other question can easily lose an hour of productive time across the 80-question exam. This guide shows you exactly which documents you get, how the viewer works, and how to build a search strategy that keeps you moving.
PE Transportation References at a Glance
- 9 discipline-specific standards + the NCEES PE Civil Reference Handbook
- 80 questions in a 9-hour appointment (8 hours exam time + scheduled break)
- All references delivered as searchable PDFs with chapter-by-chapter navigation
- You can open one chapter at a time from a linked table of contents
- Ctrl+F searches within the open chapter only—not across the entire document
- No outside notes, books, or personal references are permitted
What Reference Documents Does NCEES Provide for the PE Transportation Exam?
NCEES supplies the following 9 reference standards for the PE Civil Transportation depth exam. These are the actual design documents used in professional practice, not condensed summaries. You also receive the NCEES PE Civil Reference Handbook, which contains general engineering formulas and tables shared across all PE Civil specialties.
| Standard | Abbreviation | Edition | Primary Topics |
|---|---|---|---|
| AASHTO A Policy on Geometric Design of Highways and Streets | GDHS-7 (“Green Book”) | 7th ed., 2018 | Horizontal/vertical curves, sight distance, superelevation, cross sections, intersections |
| AASHTO Guide for the Design of Pavement Structures | GDPS-4 | 1993 | Empirical (1993) flexible and rigid pavement design, structural number, drainage coefficients |
| AASHTO Guide for the Planning, Design, and Operation of Pedestrian Facilities | GPF-1 | 2021 | Pedestrian design, sidewalks, crosswalks, ADA compliance, pedestrian signals |
| AASHTO Highway Safety Manual | HSM-1 | 1st ed., 2010 + 2014 supplement | Crash prediction models, safety performance functions (SPFs), crash modification factors (CMFs) |
| AASHTO Mechanistic-Empirical Pavement Design Guide | MEPDG | 3rd ed., 2020 | Mechanistic-empirical pavement design, climate inputs, traffic loading, distress models |
| AASHTO Roadside Design Guide | RSDG-4 | 4th ed., 2011 | Clear zones, barriers, guardrail, crash cushions, roadside hazard mitigation |
| FHWA Hydraulic Design of Highway Culverts | HIF-12-026 | 3rd ed., 2012 | Culvert hydraulics, headwater/tailwater, inlet/outlet control, culvert sizing |
| HCM: A Guide for Multimodal Mobility Analysis (Highway Capacity Manual) | HCM | 6th ed., 2016 | Level of service (\( v/c \) ratio analysis), capacity analysis, signal timing, freeway/arterial/intersection operations |
| Manual on Uniform Traffic Control Devices | MUTCD | 2009, Rev 1&2, May 2012 | Signs, signals, pavement markings, work zones, traffic control plans |
| Plus the NCEES PE Civil Reference Handbook — general engineering formulas, unit conversions, and tables shared across all PE Civil depth exams. | |||
How Does the Searchable PDF Viewer Work During the Exam?
Understanding the reference viewer’s limitations before exam day is critical. The system is not like reading a PDF on your personal computer—it has specific constraints that affect how quickly you can find information.
How navigation works:
- Each reference document opens to a linked table of contents listing its chapters and major sections.
- You click on a chapter title to open that chapter’s content.
- You can only have one chapter open at a time. To view a different chapter, you return to the table of contents and select the new one.
- Within an open chapter, you can use Ctrl+F to search for terms, table numbers, or keywords.
- Ctrl+F searches only within the currently open chapter—it does not search across the entire document or across multiple references.
- You can switch between different reference documents using a sidebar or menu, but you still navigate chapter by chapter within each one.
What this means in practice: If you need a specific table from the Green Book but you don’t know which chapter it’s in, you cannot just Ctrl+F the entire document for the table number. You would have to open each chapter one by one and search within it—a process that could burn several minutes. The candidates who do well are the ones who already know which chapter to look in before they start searching.
Which Standards Should You Know Best for the PE Transportation Exam?
Not all 9 reference documents carry equal weight on the exam. Based on the NCEES exam specification topic areas and their approximate question counts, here is how to prioritize your familiarity with each standard.
Tier 1: Know These Inside and Out
AASHTO Green Book (GDHS-7) — The Green Book underpins the largest cluster of exam topics: horizontal design, vertical design, cross-section design, and intersection design. You will reference it for stopping sight distance tables, superelevation rate tables, minimum curve radii, K-values for vertical curves, lane widths, shoulder widths, and intersection sight distance. Expect to use it on 20–30+ questions directly or indirectly.
Highway Capacity Manual (HCM, 6th edition) — Traffic engineering is the highest-weight topic area on the exam. The HCM provides the methodology for level-of-service analysis on freeways, multilane highways, two-lane highways, signalized intersections, unsignalized intersections, and urban streets. You need to know the chapter structure well enough to jump straight to the correct facility type’s analysis procedure. Key relationships include the volume-to-capacity ratio:
\[ \frac{v}{c} = \frac{V_p}{s_f \cdot N \cdot f_{HV} \cdot f_p} \]and Webster’s optimal cycle length for signal timing:
\[ C_o = \frac{1.5L + 5}{1 - Y} \]Tier 2: Know the Key Chapters
MUTCD (2009) — Covers all traffic control device questions: sign placement, signal warrants, pavement markings, work zone traffic control, and school zones. The MUTCD is heavily referenced for “shall/should/may” requirements—the exam often tests whether a specific practice is mandatory, recommended, or optional.
AASHTO Guide for the Design of Pavement Structures (GDPS-4) — The 1993 empirical method for flexible and rigid pavement design. Know how to use the structural number (SN) equation, drainage coefficients, and the design nomographs. This is a relatively focused document, so learning its layout is straightforward.
AASHTO MEPDG (3rd edition) — The mechanistic-empirical companion to the 1993 guide. Questions may cover the conceptual framework, input levels, distress prediction models, and reliability concepts. This is a more modern approach to pavement design, and the exam tests both the 1993 and MEPDG methods.
Tier 3: Know Where to Find Key Content
AASHTO Highway Safety Manual (HSM-1) — Used for safety analysis questions: crash prediction, safety performance functions, crash modification factors, and the predictive method. Know that Part C contains the predictive method chapters organized by facility type.
AASHTO Roadside Design Guide (RSDG-4) — Clear zone distances, barrier warrants, guardrail design, and roadside hazard analysis. Relatively few questions, but when they come up, you need to know that clear zone tables are in Chapter 3 and barrier information is in Chapters 5–8.
FHWA Hydraulic Design of Highway Culverts (HIF-12-026) — Culvert sizing, headwater depth calculations, inlet and outlet control. This is a niche document—expect just a handful of questions—but the problems are very solvable if you can quickly find the right chart or nomograph. Drainage questions often start with the Rational Method \( Q = CiA \) or Manning’s Equation:
\[ Q = \frac{1.49}{n} A R^{2/3} S^{1/2} \]where \( n \) = Manning’s roughness coefficient, \( A \) = cross-sectional area, \( R \) = hydraulic radius, \( S \) = slope.
AASHTO Guide for Pedestrian Facilities (GPF-1) — Pedestrian design, sidewalk widths, crosswalk placement, ADA requirements. Relatively new to the exam reference list. Know its general scope so you can look up specifics when a pedestrian design question appears.
How Do You Navigate the AASHTO Green Book Quickly?
Because the Green Book is your most-used reference, investing time in learning its chapter structure pays the highest dividends. Here are the key chapters and what to find in each.
| Chapter | Title | What to Find Here |
|---|---|---|
| Ch 1 | Highway Functions | Functional classification, access vs. mobility, design designation |
| Ch 2 | Design Controls and Criteria | Design speed, design vehicle dimensions, driver perception-reaction time |
| Ch 3 | Elements of Design | Most-used chapter. Sight distance tables (SSD, PSD, DSD), horizontal curve formulas (\( R = \frac{V^2}{15(e+f)} \)), superelevation tables, vertical curve K-values (\( K = \frac{L}{|A|} \)), grade considerations |
| Ch 4 | Cross-Section Elements | Lane widths, shoulder widths, medians, side slopes, curb types, cross-section dimensions |
| Ch 7 | Rural and Urban Arterials | Design standards for arterial roadways, speed, alignment, and cross-section criteria |
| Ch 9 | Intersections | Intersection sight distance, turning radii, channelization, roundabout geometry |
| Ch 10 | Grade Separations and Interchanges | Ramp design, interchange types, merge/diverge areas, acceleration/deceleration lanes |
Quick-navigation tip: When a question involves stopping sight distance, go directly to Chapter 3 and search for “Exhibit 3” to jump to the exhibits (tables and figures). For intersection sight distance, go to Chapter 9. For cross-section dimensions, go to Chapter 4. Building these reflexes during your study period means you spend seconds, not minutes, finding the right page on exam day.
Key Green Book Formulas (Chapter 3)
These are the core geometric design formulas you will find in Chapter 3 and use most frequently on the exam:
Stopping Sight Distance:
\[ SSD = 1.47Vt + \frac{V^2}{30\left(\frac{a}{32.2} \pm G\right)} \]Horizontal Curve Radius:
\[ R = \frac{V^2}{15(e + f)} \]Horizontal Curve Length:
\[ L = \frac{R \Delta \pi}{180} \]Middle Ordinate:
\[ M = R\left(1 - \cos\frac{\Delta}{2}\right) \]Vertical Curve K-value:
\[ K = \frac{L}{|A|} \]where \( A = g_2 - g_1 \) (algebraic difference of grades in %)
Superelevation:
\[ e + f = \frac{V^2}{15R} \]What Are the Most Common Search Mistakes on the PE Transportation Exam?
These pitfalls cost candidates real points. Each one is avoidable with deliberate preparation.
1. Opening the wrong document entirely. A question about signal warrant analysis requires the MUTCD, not the HCM. A question about clear zone distance requires the Roadside Design Guide, not the Green Book. Before you open any reference, pause for five seconds and ask yourself: “Which document contains this information?”
2. Searching the wrong chapter within the right document. You know the answer is in the HCM, but you open the freeway chapter when the question is about a signalized intersection. Each HCM facility type has its own chapter with its own LOS methodology. Misidentifying the facility type sends you to the wrong chapter entirely.
3. Searching for the wrong term. The reference documents use precise terminology. If you search for “braking distance” but the Green Book calls it “braking distance on grade” or “stopping sight distance,” your Ctrl+F may return no results. Learn the exact terminology each document uses for key concepts.
4. Over-relying on references for content you should have memorized. If you need to look up the stopping sight distance formula every time, you are burning 2–3 minutes per question on something that should be in your head. Some content must be memorized to maintain a sustainable pace (see the section below).
5. Not returning to the question after a failed search. If you cannot find what you need after 90 seconds of searching, flag the question and move on. Come back with fresh eyes later. Spending 5+ minutes searching for a single table value is one of the fastest ways to run out of time.
Which Formulas Should You Memorize vs. Look Up?
Memorize these (you will use them repeatedly and cannot afford the lookup time):
- Stopping sight distance: \[ SSD = 1.47Vt + \frac{V^2}{30\left(\frac{a}{32.2} \pm G\right)} \] where \( V \) = design speed (mph), \( t \) = perception-reaction time (s), \( a \) = deceleration (ft/s²), \( G \) = grade (decimal)
- Horizontal curve radius: \[ R = \frac{V^2}{15(e + f)} \] Curve length: \( L = \frac{R \Delta \pi}{180} \), Middle ordinate: \( M = R\left(1 - \cos\frac{\Delta}{2}\right) \)
- Vertical curve K-value: \[ K = \frac{L}{|A|} \] where \( A = g_2 - g_1 \) (algebraic difference of grades in %), and \( L \) = curve length (ft)
- Superelevation: \( e + f = \frac{V^2}{15R} \)
- Peak hour factor: \( \text{PHF} = \frac{V}{4 \times V_{15}} \)
- Basic LOS thresholds for freeways (density-based) and signalized intersections (delay-based)
- AASHTO 1993 flexible pavement structural number: \( SN = a_1 D_1 + a_2 D_2 m_2 + a_3 D_3 m_3 \)
- Crash rate: \( R = \frac{C \times 1{,}000{,}000}{ADT \times N \times 365} \)
Look these up (they involve tables, charts, or multi-step procedures that are impractical to memorize):
- HCM saturation flow rate adjustment factors
- HCM freeway segment adjustment procedures
- Superelevation rate tables for specific design speeds and curve radii
- Crash modification factors (CMFs) from the Highway Safety Manual
- MUTCD signal warrant thresholds and specific sign dimensions
- Culvert design nomographs from HIF-12-026
- Clear zone distance tables from the Roadside Design Guide
- Drainage coefficients and layer coefficients from GDPS-4
- MEPDG distress model inputs and climate data
How Can You Practice Searching Reference Documents Before Exam Day?
The best way to build speed with the reference documents is to simulate the exam’s chapter-by-chapter constraint during your study period. Here is a practical approach.
1. Obtain the correct editions. Download or purchase the exact editions listed on the NCEES exam specification. Using a different edition means different chapter numbers, different table numbers, and different page layouts—all of which will slow you down on exam day. AASHTO publications can be purchased through the AASHTO Store. The MUTCD is freely available from the FHWA website.
2. Simulate the chapter constraint. When practicing, do not use your PDF reader’s global search. Instead, open the table of contents, select the chapter you think contains the answer, and then use Ctrl+F only within that chapter. This trains the same navigation pattern you will use on exam day.
3. Time your lookups. During practice problems, track how long each reference lookup takes. Set a target of under 60 seconds per lookup. If a lookup consistently takes longer than 90 seconds, you either need to learn that document’s structure better or consider memorizing the content.
4. Build a mental chapter index. For each reference document, write a one-page summary of its chapter titles and the key content in each chapter. Review this summary weekly. On exam day, you should be able to name the chapter you need without opening the table of contents first.
5. Practice with realistic problems. The best preparation is working through problems that require you to look up values in the actual reference documents. This builds the muscle memory of navigating to the right chapter, finding the right table, and extracting the right value—all under time pressure.
Frequently Asked Questions
How many reference documents are provided on the PE Civil Transportation exam?
NCEES provides 9 discipline-specific reference standards (including the AASHTO Green Book, HCM, MUTCD, and others) plus the NCEES PE Civil Reference Handbook. All are delivered as searchable PDFs on the exam computer at the Pearson VUE testing center.
Can you use Ctrl+F to search the PE exam reference documents?
Yes, but with a limitation. You can only open one chapter of a reference document at a time through a linked table of contents. Ctrl+F searches within the currently open chapter, not across the entire document. You must navigate to the correct chapter first, then use Ctrl+F to find specific terms within it.
Which PE Transportation reference document is the most important?
The AASHTO Policy on Geometric Design (the “Green Book”) and the Highway Capacity Manual (HCM) are generally considered the two most critical references, covering geometric design and traffic capacity analysis respectively. The MUTCD is also heavily tested for traffic control device questions.
Should I memorize formulas or look them up during the PE Transportation exam?
Core formulas you will use repeatedly—stopping sight distance, horizontal curve geometry, basic LOS thresholds—should be memorized to save time. Reference-heavy formulas like HCM adjustment factors, crash modification factors, and pavement design equations are better looked up during the exam since they involve tables and multi-step procedures.
Can I bring my own reference materials to the PE Civil Transportation exam?
No. The PE Civil exam is closed-book. NCEES provides all reference materials digitally on the exam computer. You cannot bring any outside notes, books, printed standards, or personal reference materials into the testing center.
Related PE Civil Transportation Guides
- PE Civil Transportation Study Guide & Topic Breakdown
- How to Pass the PE Civil Transportation Exam
- PE Civil Transportation Practice Problems
- FE Reference Handbook Guide — Tips for navigating NCEES reference materials
- PE Civil Structural Reference Documents
- PE Civil Water Resources Reference Documents
Disclaimer: This guide is an independent educational resource and is not affiliated with, endorsed by, or sponsored by NCEES, AASHTO, FHWA, or TRB. The “PE” exam and “NCEES” are trademarks of the National Council of Examiners for Engineering and Surveying. Exam specifications, reference documents, and editions are subject to change; always refer to the official NCEES website for the most current information.