Transportation Engineering Calculators
Professional, standard-compliant tools for Traffic Analysis, Pavement Design, and Highway Engineering.
Streamline Your Engineering Workflow
Whether you are a civil engineering student or a professional transportation planner, our suite of free online transportation engineering tools helps you solve complex problems in seconds. From determining Highway Capacity Level of Service (LOS) to calculating stopping sight distances, our tools utilize AASHTO and HCM methodologies to ensure accuracy.
Available Tools
Traffic Flow Calculator
Calculate volume, density, speed, and headway using fundamental traffic flow models (Greenshields, etc.).
Launch ToolPavement Design
Design flexible and rigid pavements based on ESALs, material properties, and AASHTO guidelines.
Launch ToolSight Distance
Determine Stopping Sight Distance (SSD), Passing Sight Distance (PSD), and decision zones.
Launch ToolHighway Capacity (HCM)
Analyze Level of Service (LOS) and capacity for freeways and multilane highways.
Launch ToolTurning Radius
Calculate minimum turning radii for various design vehicles to ensure intersection safety.
Launch ToolRoad Grade & Vertical Curves
Compute road gradients, elevations, and vertical curve geometry for drainage and safety.
Launch ToolParking Lot Design
Optimize stall dimensions, aisle widths, and total capacity for parking facilities.
Launch ToolIntersection Delay
Estimate vehicle control delay and queue lengths at signalized and unsignalized junctions.
Launch ToolSignal Timing
Design phase splits, cycle lengths (Webster’s method), and green times for traffic signals.
Launch ToolStopping Distance
Calculate total braking distance based on speed, friction, and reaction time.
Launch ToolTrip Generation
Forecast trips generated by new developments based on land use codes (ITE based).
Launch ToolModal Split
Analyze mode choice probabilities (Car vs. Transit vs. Walk) using utility functions.
Launch ToolRoundabout Capacity
Determine entry capacity and delays for single and multi-lane roundabouts.
Launch ToolPedestrian Flow
Analyze sidewalk LOS, flow rates, and density for pedestrian facilities.
Launch ToolBicycle Lane Design
Design cycle tracks and lanes based on vehicle speed and volume separation requirements.
Launch ToolWhy Engineers Trust These Tools
AASHTO Compliant
Methodologies aligned with standard design policies.
Instant Results
Zero latency calculations for rapid design iteration.
Mobile Ready
Use on-site via tablet or smartphone without app installation.