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RAV Route Assessment Calculators

Get the tools you need to easily assess any routes for access


The heavy vehicle toolkit assists road managers in making an informed access decision by using assessment tools and calculators.

These tools have been developed to assist road managers in better understanding the performance of heavy vehicles and their impacts. This information is critical for making an informed access decision. Each tool allows the user to calculate the performance of a proposed vehicle and compare these results to an existing vehicle for reference. The comparison method includes consideration of the broader freight task and allows the road manager to quantify the relative safety and productivity benefits of various vehicle configurations.

Tri-drive maximum grade calculator

RAV Grades

Find the maximum grade before a tandem or tri-drive vehicle combination loses traction according to the vehicle drive axle group load and friction factor.

ESA pavement calculator

ESA Calculator

Determine design traffic and pavement wear for different heavy vehicle combinations in terms of the number of Equivalent Standard Axles (ESA).

Intersection risk calculator

Intersection Acceleration Risk

The heavy vehicle intersection and acceleration risk calculator enables a comparison of the acceleration performance of a proposed vehicle with an existing vehicle.