Haul Road Design Tool
Screen road width, maximum grade and curve-radius criteria using the project’s own truck dimensions and acceptance criteria.
Use the Haul Road Design Tool
Screen road width, maximum grade and curve-radius criteria using the project’s own truck dimensions and acceptance criteria.
Calculations happen locally in your browser. ToolLott does not send these inputs to a server for this tool.
Preliminary engineering screening only. It does not replace project-specific design, applicable codes/standards, manufacturer data, transient/fatigue studies, geotechnical or site assessment, professional review or independent verification.
How to use it
Replace the worked-example values with actual project data. Review the intermediate quantities and visible assumptions before using the result elsewhere.
How the Haul Road Design Tool works
Screen road width, maximum grade and curve-radius criteria using the project’s own truck dimensions and acceptance criteria. The methodology below exposes the production equation, a QA-verified worked example and the boundary between this screen and detailed design.
Calculation breakdown
ToolLott will explain the current inputs and displayed result here.
Haul-road geometric screening against user-entered criteria
The production engine evaluates screen width = truck operating width x width factor; grade/radius = compare measured values with project limits. It begins by multiply operating truck width by the project width factor., then compare measured maximum grade with the entered grade limit., and finally compare available curve radius with the entered project minimum. This keeps the calculation auditable instead of hiding design assumptions behind a single number.
screen width = truck operating width x width factor; grade/radius = compare measured values with project limitsToolLott evaluates the relationship using the entered units and full numeric precision before display rounding.
| Symbol / input | Meaning | Unit |
|---|---|---|
roadLength | Road length (km) | user input |
truckWidth | Truck operating width (m) | user input |
widthFactor | Road-width factor (x truck width) | user input |
maxGrade | Measured / proposed max grade (%) | user input |
gradeLimit | Project max grade criterion (%) | user input |
availableRadius | Available minimum curve radius (m) | user input |
minRadius | Project minimum curve radius criterion (m) | user input |
Step-by-step method
- Multiply operating truck width by the project width factor.
- Compare measured maximum grade with the entered grade limit.
- Compare available curve radius with the entered project minimum.
Worked example
Maya, a project engineer, is screening a 1.2 km mine haul road for 90 t trucks and needs to compare grades, widths and curve constraints before detailed design.
Example inputs
- Road length (km): 1.2
- Truck operating width (m): 4.2
- Road-width factor (x truck width): 3.5
- Measured / proposed max grade (%): 8
- Project max grade criterion (%): 10
- Available minimum curve radius (m): 45
- Project minimum curve radius criterion (m): 40
Calculation / processing
Road width = 4.2 x 3.5 = 14.7 m.8% maximum grade is below the entered 10% limit: PASS.45 m curve radius is above the entered 40 m minimum: PASS.
Use the result as a screening or quantity-planning value and compare it with the project criteria, manufacturer data and applicable engineering requirements before making a design or procurement decision.
Assumptions
- The entered values are representative of the condition being screened and use the units shown on the page.
- The equation models only the stated relationship; omitted system effects are not silently estimated.
Limitations
- This page is not engineering certification and does not replace applicable standards, design loads, manufacturer data, site investigation or competent professional review.
- Results can change materially when real geometry, losses, transients, material properties, duty cycles, safety factors or regulatory criteria differ from the simplified inputs.
Common questions
Is this a final engineering design?
No. It is a transparent screening calculation using the entered assumptions and the stated equation.
Why does the page show assumptions and limitations?
Engineering formulas are only valid within their modelling assumptions; exposing them helps users decide what additional design checks are required.
Should I use the rounded displayed value in later design work?
Use suitable calculation precision and the governing project/standard requirements rather than relying on display rounding alone.
Methodology sources
This page uses basic mathematical or ToolLott implementation logic that does not require an external factual source. The worked result is still tied to the production tool and QA example.
Related ToolLott tools
A realistic way Maya could use this tool
Maya is a project engineer.
Maya is screening a 1.2 km mine haul road for 90 t trucks and needs to compare grades, widths and curve constraints before detailed design.
For the worked run, Maya enters road length = 1.2; truck width = 4.2; width factor = 3.5; max grade = 8; grade limit = 10; available radius = 45; plus 1 additional entered field. With those exact values, the page produces Screening road width: 14.7 m; every input remains visible so the result can be traced back to the scenario data.
The practical output is Screening road width: 14.7 m. That gives Maya a concrete basis to compare grades, widths and curve constraints before detailed design. The page also keeps this limitation explicit: Preliminary screening/planning calculation only.
Fictional scenario using realistic example data. For Ready tools, the worked result is tied to the tested example shown in the tool. Replace the figures with your own inputs and independently verify important professional, financial, legal, health or safety decisions.
What this tool is for
Use it to screen road width, maximum grade and curve-radius criteria using the project’s own truck dimensions and acceptance criteria.
It sits within ToolLott’s Mining collection, where you can also estimate camp population, conveyor power, dewatering, earthworks, fuel consumption, haul-road inputs, tank sizing and ventilation.