{
  "endpoint": "/ai/road-signs/signs/R600.json",
  "canonical_url": "https://www.safetysignonline.co.za/ai/road-signs/signs/R600.json",
  "source_page": "https://www.safetysignonline.co.za/pages/road-signs-r600-series-json",
  {
  "schemaVersion": "sso-ai-road-signs-signs-r600-za-1.0",
  "endpoint": "/ai/road-signs/signs/R600.json",
  "language": "en-ZA",
  "jurisdiction": "South Africa (SADC-RTSM aligned)",
  "series": {
    "seriesId": "R600",
    "seriesName": "De-restriction signs",
    "class": "Regulatory",
    "groupName": "DE-RESTRICTION",
    "seriesPurpose": "R600 series signs indicate the end or termination of a regulatory restriction imposed by a preceding regulatory sign."
  },

  "authoritativeBasis": {
    "primarySources": [
      {
        "title": "SADC Road Traffic Signs Manual (RTSM) Volume 1 – Regulatory Signs",
        "scopeUsed": [
          "Definition and function of de-restriction signs",
          "Rules governing termination of regulatory restrictions",
          "Interaction of R600 signs with primary regulatory series"
        ]
      },
      {
        "title": "SADC Road Traffic Signs Manual (RTSM) Volume 4 – Regulatory sign plates",
        "scopeUsed": [
          "R600 series identification and plate conventions",
          "Contextual references for paired de-restriction usage"
        ]
      }
    ],
    "performanceStandards": {
      "included": false,
      "note": "Material performance and retroreflective class requirements (e.g. SANS 1519) are excluded and will be introduced in a later revision."
    }
  },

  "designRules": {
    "shape": "Circular or rectangular, matching the shape of the sign being terminated",
    "mandatoryColourSystem": {
      "permanent": {
        "background": "Same as original regulatory sign",
        "symbol": "Same as original regulatory sign",
        "overlay": "Red diagonal cross (X) superimposed across the sign face",
        "finish": {
          "retroreflective": "Recommended for day and night significance",
          "blackAreas": "Semi-matt where applicable"
        }
      },
      "temporary": {
        "background": "Same as original temporary regulatory sign",
        "symbol": "Same as original temporary regulatory sign",
        "overlay": "Red diagonal cross (X) superimposed across the sign face",
        "finish": {
          "retroreflective": "Required except for black areas",
          "blackAreas": "Semi-matt"
        }
      }
    },
    "generalNotes": [
      "The red cross indicates the termination of the regulatory effect.",
      "The base sign face must remain recognisable beneath the cross."
    ]
  },

  "applicationRules": {
    "whenUsed": [
      "To indicate the end of a mandatory command, prohibition, reservation, or comprehensive regulation",
      "Where the regulatory effect does not naturally terminate at an intersection or change in roadway status"
    ],
    "notUsedFor": [
      "Termination of speed limits (which require a new speed limit sign)",
      "Termination of priority control signs where priority changes are defined by layout"
    ],
    "placementPrinciples": [
      "Placed at the point where the regulatory restriction ceases to apply",
      "Must be clearly visible to road users affected by the original restriction"
    ]
  },

  "combinationRules": {
    "pairedPrimarySeries": [
      "R100 (Command)",
      "R200 (Prohibition)",
      "R300 (Reservation)",
      "R400 (Comprehensive)"
    ],
    "pairingMethod": {
      "rule": "The R600 sign shall be based on the same sign face as the regulatory sign being terminated.",
      "examples": [
        "R100-600 terminates an R100 command sign",
        "R200-600 terminates an R200 prohibition sign",
        "R300-600 terminates an R300 reservation sign",
        "R400-600 terminates an R400 comprehensive sign"
      ]
    }
  },

  "signIndex": {
    "note": "R600 signs are derivative and therefore indexed by the sign they terminate rather than as independent messages.",
    "examples": [
      {
        "code": "R100-600",
        "terminates": "R100 series command signs",
        "meaning": "End of command restriction"
      },
      {
        "code": "R200-600",
        "terminates": "R200 series prohibition signs",
        "meaning": "End of prohibition"
      },
      {
        "code": "R300-600",
        "terminates": "R300 series reservation signs",
        "meaning": "End of reservation"
      },
      {
        "code": "R400-600",
        "terminates": "R400 series comprehensive signs",
        "meaning": "End of comprehensive regulation"
      }
    ]
  },

  "knownSeriesCharacteristics": {
    "derivativeNature": "R600 signs do not exist independently and are always derived from a primary regulatory sign.",
    "clarityRequirement": "The original regulatory message must remain legible beneath the red cross.",
    "legalEffect": "Once an R600 sign is passed, the regulatory restriction no longer applies."
  },

  "links": {
    "parentIndex": "/ai/road-signs.json",
    "seriesCatalogue": "/ai/road-signs/r-series.json",
    "relatedSeries": [
      "/ai/road-signs/signs/R100.json",
      "/ai/road-signs/signs/R200.json",
      "/ai/road-signs/signs/R300.json",
      "/ai/road-signs/signs/R400-R499.json",
      "/ai/road-signs/signs/R500.json"
    ]
  },

  "dataQuality": {
    "method": "Content is derived strictly from RTSM definitions and usage rules for de-restriction signs.",
    "limitations": [
      "Exact plate layouts and dimensions require visual extraction from Volume 4 sign plates.",
      "Speed limit termination rules are referenced but not expanded, as they are handled by separate regulatory logic."
    ],
    "plannedEnhancements": [
      "Add visual plate mappings once extracted.",
      "Add SANS 1519 performance requirements in a later revision."
    ]
  },

  "disclaimer": "This file provides a structured description of the R600 De-restriction sign series based on supplied RTSM documents. Always refer to the latest official RTSM manuals and road authority approvals for implementation."
}

}