Estimate Turning Movement Counts (TMCs) from AADT or Link Volumes
The Arterials.co AADT to TMC Estimator helps traffic engineers estimate planning-level turning movement counts (TMCs) using:
- AADT volumes
- Directional link volumes
- Upstream traffic counts
- K-Factors
- Peak Hour Factors (PHF)
- User-defined turning movement constraints
Available Estimation Modes
- Peak Hour Traffic Estimator
- Link Volume to Turning Movement Count
- AADT to Peak Hour Turning Movement Estimation
The tool is intended for situations where formal turning movement counts are unavailable, incomplete, outdated, or unnecessary for the level of analysis being performed.
Typical applications include:
- Preliminary Traffic Impact Assessments (TIA)
- Intersection capacity analysis
- Conceptual transportation planning
- Development review
- Corridor screening and operational studies
The estimator generates an internally balanced set of turning movement volumes using the Furness (Fratar) balancing method, combining upstream traffic volumes with user-defined turning movement assumptions to produce an initial feasible solution. Users can then interactively refine individual turning movements while continuously checking downstream volume balance to ensure consistency with observed roadway volumes..
Features
- AADT to Turning Movement estimation
- Link Volume to TMC conversion
- Peak Hour Volume (PHV) estimation using K-Factor and PHF
- Furness (Fratar) traffic balancing
- Interactive turning movement adjustment
- Downstream volume balance validation
- Visual turning movement diagram
- PNG export
Disclaimer
This tool provides planning-level estimates of turning movement volumes and is intended to support preliminary transportation planning and traffic engineering analyses. Results should be verified using engineering judgment and, where appropriate, field-collected traffic counts before being used for detailed design or operational decisions.
→ Click Here to Use the AADT to TMC Estimator
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