| clearanceWork | EnumerationLiteral
| 0 | Clearance work of an unspecified nature. |
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| controlledAvalanche | EnumerationLiteral
| 1 | Controlled avalanche work. |
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| installationWork | EnumerationLiteral
| 2 | Installation of new equipments or systems on or along-side the roadway. |
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| grassCuttingWork | EnumerationLiteral
| 3 | Grass cutting work. |
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| litterClearance | EnumerationLiteral
| 4 | Work to collect litter from the roadway and/or adjacent verges. |
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| maintenanceWork | EnumerationLiteral
| 5 | Maintenance of road, associated infrastructure or equipments. |
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| overheadWorks | EnumerationLiteral
| 6 | Works which are overhead of the carriageway. |
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| repairWork | EnumerationLiteral
| 7 | Repair work to road, associated infrastructure or equipments. |
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| resurfacingWork | EnumerationLiteral
| 8 | Work associated with relaying or renewal of worn-out road surface (pavement). |
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| roadMarkingWork | EnumerationLiteral
| 9 | Striping and repainting of road markings, plus placement or replacement of reflecting studs (cats' eyes). |
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| roadsideWork | EnumerationLiteral
| 10 | Road side work of an unspecified nature. |
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| roadworksClearance | EnumerationLiteral
| 11 | Roadworks are completed and are being cleared. |
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| roadworks | EnumerationLiteral
| 12 | Road maintenance or improvement activity of an unspecified nature which may potentially cause traffic disruption. |
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| rockFallPreventativeMaintenance | EnumerationLiteral
| 13 | Rock fall preventative maintenance. |
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| saltingInProgress | EnumerationLiteral
| 14 | Spreading of salt and / or grit on the road surface to prevent or melt snow or ice. |
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| snowploughsInUse | EnumerationLiteral
| 15 | Snowploughs or other similar mechanical devices in use to clear snow from the road. |
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| sweepingOfRoad | EnumerationLiteral
| 16 | Sweeping of the roadway. |
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| treeAndVegetationCuttingWork | EnumerationLiteral
| 17 | Tree and vegetation cutting work adjacent to the roadway. |
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| other | EnumerationLiteral
| 18 | Other than as defined in this enumeration. |
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