16-Civ-A6 Highway Design, Construction, and Maintenance
Worked solutions to 14 past sittings (2013–2019), 94 questions. Pick a sitting, or start from a topic below.
- December 2019
- December 2018
- May 2018
- December 2017
- May 2017
- December 2016
- May 2016
- December 2015
- May 2015
- December 2014
- May 2014
- December 2013
- May 2013
- Undated paper
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Greenshields Model (6 sittings): December 2015 Q4 · May 2015 Q4 · December 2014 Q4 · May 2014 Q4 · December 2013 Q4 · May 2013 Q4
- IIA Property (6 sittings): December 2016 Q7 · May 2016 Q7 · December 2015 Q7 · May 2015 Q7 · December 2014 Q7 · December 2013 Q7
- Multinomial Logit Mode Choice (6 sittings): December 2016 Q7 · May 2016 Q7 · December 2015 Q7 · December 2014 Q7 · May 2014 Q7 · December 2013 Q7
- Regression (6 sittings): December 2016 Q3 · December 2015 Q3 · May 2015 Q3 · December 2014 Q3 · May 2014 Q3 · May 2013 Q3
- Trip Generation (5 sittings): May 2016 Q1 · December 2015 Q3 · May 2015 Q3 · December 2014 Q3 · May 2014 Q3
- Braess Paradox (4 sittings): May 2016 Q6 · December 2014 Q6 · May 2014 Q6 · December 2013 Q6
- Land Use (4 sittings): May 2016 Q1 · December 2015 Q1 · May 2015 Q1 · May 2014 Q1
- User-Equilibrium Traffic Assignment (4 sittings): December 2016 Q6 · December 2015 Q6 · May 2015 Q6 · December 2013 Q6
- Cross-Classification (3 sittings): December 2015 Q3 · May 2015 Q3 · December 2014 Q3
- Shock Waves (3 sittings): December 2015 Q4 · December 2014 Q4 · May 2014 Q4
- Spiral length (3 sittings): December 2019 Q4 · December 2018 Q2 · May 2018 Q3
- Trip Generation by Cross-Classification (3 sittings): December 2016 Q3 · May 2016 Q3 · December 2013 Q3
- User-Equilibrium Assignment (3 sittings): May 2016 Q6 · December 2014 Q6 · May 2014 Q6
- By regression (2 sittings): May 2016 Q3 · December 2013 Q3
- Clear zone (2 sittings): December 2018 Q2 · May 2018 Q3
Questions by sitting
December 2019
- Question 1: Sag vertical curve and night sight distance on a wildlife-collision section
- Question 2: Design ESAL for a 25-year urban freeway pavement
- Question 3: Flexible pavement design for 10 million ESALs
- Question 4: Horizontal curve, spiral length and clear zone on an urban expressway
- Question 5: Plain jointed concrete slab thickness for 12 million ESALs
- Question 6: PGAC grading and the Superpave versus Marshall mix design methods
- Question 7: Frost action, TAC typical design and a granular base equivalency alternative
December 2018
- Question 1: AASHTO 1993 flexible pavement design for a six-lane urban freeway
- Question 2: Horizontal curve adequacy, clear zone and spiral length
- Question 3: Rigid pavement — back-calculating the design ESAL and revising the slab
- Question 4: Crest vertical curve — reconstructing a rear-end collision
- Question 5: Design ESAL for a new urban freeway with staged traffic growth
May 2018
- Question 1: Crest-curve sight distance and accident causation
- Question 2: Design ESAL and AASHTO flexible pavement design
- Question 3: Expressway curve — radius, clear zone and spiral length
- Question 4: Exit-ramp curves and roadside sight obstruction
- Question 5: Asphalt Institute redesign of a Northern Ontario pavement
- Question 6: Burmister two-layer analysis of plate bearing tests
- Question 7: Life-cycle cost analysis and flexible-pavement distress
December 2017
- Question 1: Directional transition around a protected area
- Question 2: Exit-ramp curve adequacy and sight clearance
- Question 3: Grades and safe speed on a sag vertical curve
- Question 4: Sag curve under a bridge, and a 1200 m curve profile
- Question 5: Flexible pavement design by the AASHTO method
- Question 6: ESALs carried by an in-service pavement, and the implied LEF
- Question 7: Short answers on traffic growth, LEF and environmental factors
May 2017
- Question 1: Interchange ramp — minimum radius, lateral clearance and stationing
- Question 2: Horizontal curve on a two-lane highway — radius check, restricted clearance and stationing
- Question 3: Crest-curve collision — was the sight distance adequate?
- Question 4: AASHTO flexible-pavement design — is the proposed structure appropriate?
- Question 5: Short answers on ESALs, equivalency factors and surface distress
- Question 6: Service life of an as-built flexible pavement
- Question 7: Vertical-curve adequacy and advance placement of a ramp sign
December 2016
- Question 1: Land Development, Sectoral Structure and Trip Production
- Question 2: Deterministic Queueing at a Toll Booth
- Question 3: Trip Generation by Cross-Classification and Regression
- Question 4: Greenshields' Model and Shock-Wave Analysis
- Question 5: Trip Distribution by the Gravity Model
- Question 6: User-Equilibrium Traffic Assignment
- Question 7: Multinomial Logit Mode Choice and the IIA Property
May 2016
- Question 1: Land Use, Travel Demand Management and Trip Generation
- Question 2: Deterministic Queueing at a Signalised Approach
- Question 3: Trip Generation by Cross-Classification and by Regression
- Question 4: Greenshields' Model and Shock Waves at a Railway Grade Crossing
- Question 5: Singly Constrained Gravity Model for Two Zones
- Question 6: User-Equilibrium Assignment and the Braess Paradox
- Question 7: Multinomial Logit Mode Choice and the IIA Property
December 2015
- Question 1: Land Use, Trip Purposes and Trip-Generation Models
- Question 2: Deterministic Queueing at a Freeway Bottleneck
- Question 3: Trip Generation — Cross-Classification vs Regression
- Question 4: Greenshields Model and Shock Waves
- Question 5: Gravity Model Trip Distribution
- Question 6: User-Equilibrium Traffic Assignment and Braess’ Paradox
- Question 7: Multinomial Logit Mode Choice and the IIA Property
May 2015
- Question 1: Land Use, Trip Production and Trip Purpose
- Question 2: Deterministic (D/D/1) Queueing at an Incident
- Question 3: Trip Generation — Cross-Classification and Regression
- Question 4: Greenshields Model and Shock Waves at a Signal
- Question 5: Gravity Model Trip Distribution
- Question 6: User-Equilibrium Traffic Assignment
- Question 7: Logit Mode Choice and the IIA Property
December 2014
- Question 1: Planning Concepts — Supply/Demand, Gravity Model, Alternative Evaluation
- Question 2: Deterministic Queueing at a Parking Lot
- Question 3: Trip Generation — Cross-Classification and Regression
- Question 4: Greenshields Model and Shock Waves
- Question 5: Singly-Constrained Gravity Model
- Question 6: User-Equilibrium Assignment and the Braess Paradox
- Question 7: Multinomial Logit Mode Choice and the IIA Property
May 2014
- Question 1: Land Use, Mode Choice and the Gravity Model
- Question 2: Deterministic Queueing at a Lane Closure
- Question 3: Trip Generation — Category Analysis vs Regression
- Question 4: Greenshields Model and Shock Waves
- Question 5: Singly-Constrained Gravity Distribution
- Question 6: User-Equilibrium Assignment and the Braess Paradox
- Question 7: Multinomial Logit Mode Choice and IIA
December 2013
- Question 1: Trip generation factors, travel demand management, and suburban travel
- Question 2: Deterministic queueing at a signalized approach
- Question 3: Trip generation by cross-classification and by regression
- Question 4: Greenshields model and shock waves at a grade crossing
- Question 5: Gravity-model trip distribution from a single origin
- Question 6: User-equilibrium traffic assignment and the Braess paradox
- Question 7: Multinomial logit mode choice and the IIA property
May 2013
- Question 1: Land use–transport interaction, logit route choice, and supply vs demand solutions
- Question 2: Deterministic queueing at a loading dock
- Question 3: Trip generation by category analysis and regression
- Question 4: Greenshields model and shock‑wave analysis of a stalled vehicle
- Question 5: Trip distribution by the gravity model
- Question 6: User‑equilibrium traffic assignment
- Question 7: Mode choice by the multinomial logit model
Undated paper
- Question 1: AASHTO-93 design of a plain jointed concrete pavement
- Question 2: Horizontal curve on a four-lane divided urban expressway
- Question 3: Design ESAL and AASHTO-93 flexible pavement for a six-lane urban freeway
- Question 4: Collision reconstruction on a crest vertical curve
- Question 5: Superpave volumetric mix design for three trial blends