Calibration route
Also: Calibration section, Measured distance
The calibration route is a section measured by the organiser, where you set up your trip meter before the rally.
The calibration route is a section of road with a precisely known length that the organiser provides before the rally. You use it to set up your odometer so it matches the roadbook measurements.
What it looks like
The calibration route is usually close to the start or to documentation checks. It is described in the roadbook or a separate sheet, with start point, end point and official length. There are often intermediate points so you can check your reading along the way. The length depends on the organiser. The longer the route, the more accurate your calibration.
How to use it
- Reset the trip meter at the start point.
- Drive the route exactly as described, with no shortcuts.
- Read the value at the end point and work out the calibration factor.
- If you have time, drive it a second time.
Good to know
Drive the route with the same load and tyre pressure you will use in the rally. Your line matters too: cutting corners measures shorter. For a Tripmaster the calibration route is a must. If you drive with GPS, you can still use it to check how well your device matches the organiser's measurements.
More in our guide to calibrating the odometer.