| value | description |
|---|---|
| aroundBendsInTheRoad | |
| atCustomsPosts | |
| atHighAltitudes | |
| atTollPlazas | |
| inGallaries | |
| inLowLyingAreas | |
| inShadedAreas | |
| inTheCityCentre | |
| inTheInnerCityAreas | |
| inRoadworksAreas | |
| inTunnels | |
| onBridges | |
| onEnteringOrLeavingTunnels | |
| onSlipRoads | |
| overTheCrestOfHills | |
| onMotorways | |
| onRoundabouts | |
| onUndergroundSections | |
| other |