{
  "endpoint": "/ai/road-signs/signs/R300.json",
  "canonical_url": "https://www.safetysignonline.co.za/ai/road-signs/signs/R300.json",
  "source_page": "https://www.safetysignonline.co.za/pages/road-signs-r300-series-json",
  {
  "schemaVersion": "sso-ai-road-signs-signs-r300-za-1.0",
  "endpoint": "/ai/road-signs/signs/R300.json",
  "language": "en-ZA",
  "jurisdiction": "South Africa (SADC-RTSM aligned)",
  "series": {
    "seriesId": "R300",
    "seriesName": "Reservation signs",
    "class": "Regulatory",
    "groupName": "RESERVATION",
    "seriesPurpose": "R300 series signs impose conditional reservation restrictions. They reserve the use of a lane, roadway, or facility for specific classes of road users or vehicles under defined conditions."
  },

  "authoritativeBasis": {
    "primarySources": [
      {
        "title": "SADC Road Traffic Signs Manual (RTSM) Volume 1 – Regulatory Signs",
        "scopeUsed": [
          "Definition of reservation signs",
          "Regulatory sign grouping and R300 series framework",
          "Colour coding principles for conditional reservation signs",
          "Rules governing permanent regulatory reservation signs"
        ]
      },
      {
        "title": "SADC Road Traffic Signs Manual (RTSM) Volume 4 – Regulatory sign plates (Chapter 2/3 extracts)",
        "scopeUsed": [
          "Series confirmation for R300 reservation signs",
          "Sign identifiers and contextual references where textually extractable"
        ]
      }
    ],
    "performanceStandards": {
      "included": false,
      "note": "SANS 1519 performance and retroreflective class requirements are intentionally excluded and will be introduced in a later revision."
    }
  },

  "designRules": {
    "shape": "Rectangular",
    "conditionalColourSystem": {
      "permanent": {
        "background": "Yellow",
        "symbol": "Black",
        "border": "Black",
        "finish": {
          "retroreflective": "Recommended for day and night significance",
          "blackAreas": "Semi-matt where applicable"
        }
      },
      "temporary": {
        "note": "The supplied RTSM extracts do not explicitly define a temporary colour system for R300 signs. No temporary variant is declared in this file."
      }
    },
    "generalNotes": [
      "Reservation signs indicate conditional use rather than absolute prohibition or command.",
      "Conditions of use may be time-based, vehicle-class-based, or function-based."
    ]
  },

  "applicationRules": {
    "whenUsed": [
      "To reserve lanes, bays, or roadway sections for specific vehicle classes or uses",
      "Where conditional access is required rather than complete prohibition"
    ],
    "notUsedFor": [
      "Mandatory actions (R100)",
      "Absolute prohibitions (R200)",
      "Priority control (R1–R6)"
    ],
    "conditionalNature": {
      "principle": "Reservation signs apply only to the specified class or condition shown on the sign.",
      "userObligation": "Road users not included in the reservation shall not use the reserved facility."
    }
  },

  "combinationRules": {
    "secondaryMessages": {
      "allowed": true,
      "secondarySeries": "R500",
      "rules": [
        "R500 signs shall not be used on their own",
        "Primary R300 sign and secondary R500 sign must use the same colour code",
        "Secondary sign modifies applicability conditions such as time, vehicle class, or operation"
      ]
    },
    "deRestriction": {
      "applicable": true,
      "method": "De-restriction is achieved by superimposing an R600 red cross on the original R300 sign.",
      "notes": [
        "De-restriction removes the reservation condition where applicable."
      ]
    }
  },

  "signIndex": {
    "note": "Only sign codes explicitly identifiable in extractable text are listed here. Image-only plates are deferred until visual extraction is completed.",
    "entries": [
      {
        "code": "R325",
        "name": "BUS AND MINIBUS STOP RESERVATION",
        "status": "text-confirmed",
        "meaning": "Reserves the indicated stopping place for buses and minibuses.",
        "commonApplications": [
          "Formal bus stops",
          "Public transport interchange points"
        ],
        "notes": [
          "Referenced explicitly in supplied RTSM text."
        ]
      },
      {
        "code": "R326",
        "name": "BUS AND MINIBUS STOP RESERVATION",
        "status": "text-confirmed",
        "meaning": "Reserves the indicated stopping place for buses and minibuses.",
        "commonApplications": [
          "Formal bus stops",
          "Public transport interchange points"
        ],
        "notes": [
          "Referenced explicitly in supplied RTSM text."
        ]
      }
    ]
  },

  "knownSeriesCharacteristics": {
    "conditionalAccess": "Only the classes shown on the sign may use the reserved facility.",
    "symbolicAndTextual": "May include symbols, text, or a combination to indicate reserved classes.",
    "enforcement": "Use of a reserved facility by unauthorised road users constitutes a regulatory offence."
  },

  "links": {
    "parentIndex": "/ai/road-signs.json",
    "seriesCatalogue": "/ai/road-signs/r-series.json",
    "relatedSeries": [
      "/ai/road-signs/signs/R1-R6.json",
      "/ai/road-signs/signs/R100.json",
      "/ai/road-signs/signs/R200.json",
      "/ai/road-signs/signs/R500.json",
      "/ai/road-signs/signs/R600.json"
    ]
  },

  "dataQuality": {
    "method": "Only information explicitly stated or unambiguously supported by the supplied RTSM documents is included.",
    "limitations": [
      "Complete enumeration of all R300 sign variants is limited by image-only sign plates in the supplied PDFs.",
      "Time-of-day and conditional legends are not expanded here and will be populated from deep plate extraction."
    ],
    "plannedEnhancements": [
      "Populate full R300 sign list once Vol 4 sign plates are visually extracted.",
      "Add SANS 1519 performance and material compliance in a later revision."
    ]
  },

  "disclaimer": "This file provides a structured, authoritative description of the R300 Reservation sign series based on supplied RTSM documents. Always follow the latest official RTSM manuals and road authority approvals for implementation."
}

}