GDOT Calculator is a full-service tool designed to simplify and expedite DOT Class and HCA identification and change detection. With broad database compatibility, user-specified tracking, analysis tools, and configurable parameters for standard calculations, GDOT Calculator is your answer to Class and HCA requirements.


Our robust suite of analysis tools and reporting functions allow users to review, analyze, accept, and integrate Class changes. Track and analyze a user-specified set of lines or line types, calculation parameters, and base or comparison projects. Automatically compare calculations to base project areas of change which can then be analyzed to determine the cause in graphic or tabular reports.

Simplify Your Workflow. With GDOT Calculator software, Sliding Mile and Clustered Class calculations are consistent with 49 CFR 192.5, and HCA calculations are consistent with 49 CFR 192.905. Calculations can be performed interactively with a graphical user interface or in a batch mode for hands-off processing.

Easy Tracking and Review. Configure parameters for standard calculations or what-if scenarios, including: zone length and width; Class and HCA density thresholds; gas factor; and controlling structure methods, like perpendicular offset or arc intersection. Quickly review user-specified parameters, areas of change, change factors, and results in the database and track all calculations, changes, Potential Impact Radius (PIRs), and structure listings.

Fully Integrated. No need to change your database model. Our software operates directly in APDM, PODS, ISAT, and custom database models.

If you would like for one of our industry experts to contact you with more information about our calculator tools, please feel free contact us directly or fill out the simple form below. Thank you for your interest.

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