| bridge | EnumerationLiteral
| 0 | Bridge on, over or under the highway. |
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| buriedCables | EnumerationLiteral
| 1 | Buried cables under or along the highway. |
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| buriedServices | EnumerationLiteral
| 2 | Unspecified buried services on, under or along the highway. |
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| crashBarrier | EnumerationLiteral
| 3 | Crash barrier. |
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| gallery | EnumerationLiteral
| 4 | Gallery. |
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| gantry | EnumerationLiteral
| 5 | Gantry over or above the roadway. |
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| gasMainWork | EnumerationLiteral
| 6 | Gas mains. |
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| interchange | EnumerationLiteral
| 7 | Motorway or major road interchange. |
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| junction | EnumerationLiteral
| 8 | Motorway or major road junction. |
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| levelCrossing | EnumerationLiteral
| 9 | Level-crossing or associated equipment. |
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| lightingSystem | EnumerationLiteral
| 10 | Road lighting system. |
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| measurementEquipment | EnumerationLiteral
| 11 | Equipment used for determining traffic measurements. |
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| noiseProtection | EnumerationLiteral
| 12 | Installations along the roadway designed to reduce road noise in the surrounding environment. |
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| road | EnumerationLiteral
| 13 | Road. |
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| roadsideDrains | EnumerationLiteral
| 14 | Roadside drains. |
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| roadsideEmbankment | EnumerationLiteral
| 15 | Roadside embankment. |
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| roadsideEquipment | EnumerationLiteral
| 16 | Roadside equipment. |
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| roadSigns | EnumerationLiteral
| 17 | Road signs. |
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| roundabout | EnumerationLiteral
| 18 | Roundabout. |
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| tollGate | EnumerationLiteral
| 19 | Toll gate. |
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| tunnel | EnumerationLiteral
| 20 | Road tunnel. |
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| waterMain | EnumerationLiteral
| 21 | Water main under or along the highway. |
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| other | EnumerationLiteral
| 22 | Other than as defined in this enumeration. |
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