Highway Engineering Calculators and Tools
Working tools for the questions that come up on real projects: which pavement strategy costs less over its life, how much material a section needs, and where a project's practices fall short.
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Checklist, 29 questions
Project sustainability self-assessment
Score a road project on planning, design, construction, maintenance and follow-up practices, then see which gaps cost the most points.
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Calculator, NPV and EUAC
Pavement lifecycle cost calculator
Compare two pavement strategies over the same analysis period, with a discount-rate sensitivity table and the break-even rate.
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Calculator, tons and cubic yards
Asphalt tonnage and concrete volume
Turn lane miles, width and thickness into tons of hot mix or cubic yards of concrete, with truckloads and optional EPD carbon.
Built to show the arithmetic
Each tool prints the formula it used next to the result, so an estimate can be checked by hand or carried into a spreadsheet. Defaults come from named sources, such as the OMB discount rate in the lifecycle cost calculator and a state DOT design bulletin for asphalt spread rates, and every one of them can be changed.
Nothing you enter leaves your browser. The self-assessment keeps your answers on your own device so you can return to a project, and the calculators keep nothing at all once the page closes. The articles each tool links to explain the engineering behind the numbers, starting with how lifecycle cost analysis works.