Traffic Density Calculator
Calculate traffic flow, density, average speed, and headway for road analysis
Traffic Flow Calculation
Vehicles that passed a point
Observation period
Traffic Density Calculation
Vehicles in road segment
Length of road segment
Traffic Analysis Results
Traffic Flow
Traffic Density
Average Speed & Headway
Average Travel Speed
Vehicle Headway
Formulas used: Flow = Vehicles ÷ Time; Density = Vehicles ÷ Length; Speed = Flow ÷ Density; Headway = 1 ÷ Density
Note: These calculations use the fundamental traffic flow equation: Flow = Speed × Density
Understanding Traffic Flow
Traffic Flow
Number of vehicles passing a point per unit time
Traffic Density
Number of vehicles occupying a road segment
Average Speed
Calculated using: Speed = Flow ÷ Density
Headway
Average distance between consecutive vehicles
Traffic Analysis Formulas
Traffic Flow: Flow = Number of Vehicles ÷ Time Period
Traffic Density: Density = Number of Vehicles ÷ Road Length
Average Speed: Speed = Flow ÷ Density
Headway: Headway = 1 ÷ Density
Important Notes
- These formulas represent ideal conditions and may vary in real scenarios
- Traffic flow becomes zero during complete traffic jams
- Higher density typically leads to lower average speeds
- These calculations help in traffic management and road planning
Example Calculation
Highway Traffic Example
Observation: 20 cars in 2 minutes
Road segment: 2 cars in 200 meters
Traffic Flow: 600 vehicles/hour
Traffic Density: 10 vehicles/km
Calculated Results
Average Speed: 60 km/h
Headway: 100 meters
Flow = Speed × Density
600 = 60 × 10 ✓
Traffic Analysis Tips
Measure traffic during peak hours for accurate analysis
Consider weather and road conditions
Use multiple observation points for better accuracy
Account for different vehicle types and sizes