Transportation Engineering Simulations
A collection of interactive 3D visualizations and simulations to help you master concepts in transportation engineering.
Highway Geometric Design - Theory & Concepts
Principles of cross-section elements, horizontal alignment, and vertical alignment.
Highway Cross-Section Builder
Traffic Flow Theory - Theory & Concepts
Fundamental relationships of traffic flow (flow, speed, density), stream models, and shockwave theory.
Traffic Flow Theory (Greenshields Model)
Model Parameters
Current Traffic State
Flow vs. Density (q-k)
Speed vs. Density (u-k)
Highway Capacity and Level of Service - Theory & Concepts
Concepts of capacity, level of service (LOS), and analysis of highway facilities.
Level of Service (LOS) Simulator
"Reasonably free flow. Freedom to maneuver is slightly restricted."
Intersection Control and Design - Theory & Concepts
Principles of intersection design, conflict points, and control types (stop, yield, roundabouts).
Conflict Point Simulator
4-Leg Cross Intersection
The traditional cross intersection has a high number of crossing conflicts, which are the most dangerous type.
Traffic Signal Design - Theory & Concepts
Principles of signal phasing, timing, and capacity analysis for signalized intersections.
Traffic Signal Timing Simulator
Adjust the cycle length and phase distributions to observe how green, amber, and all-red clearance intervals allocate time to competing traffic streams at an intersection.
Public Transportation Systems - Theory & Concepts
Overview of public transit modes, characteristics, capacity, and operations.
Transit Fleet Size & Scheduling Simulator
Adjust the route parameters to see how running time and layovers dictate the required fleet size to maintain a specific headway.
Pavement Design - Theory & Concepts
Principles of flexible and rigid pavement design, ESAL calculations, and the AASHTO method.
AASHTO Flexible Pavement Design
Design Inputs
Lower $M_R$ means weaker soil, requiring a thicker pavement.
Layer Thicknesses (inches)
Railway Engineering - Theory & Concepts
Principles of railway track structure, train resistance, geometric design, and operations.
Railway Track Structure
Controls
Info
The track structure distributes immense point loads from the wheels safely to the subgrade.
Airport Engineering - Theory & Concepts
Principles of airport planning, runway orientation, length corrections, and geometric design.
Runway Length Correction Simulator
Air density decreases at higher altitudes.
Std. Temp at 600m is 11.1°C.