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Figure 21 Minimum Size of a Road Element Figure 20 Cul-de-Sac with a Central Island Minimum 2.0 m 1 2 3 4 5 6 7 8 9 10 11 12 14 an ellipse), called a bulb, as shown in Figure 20. e bulb allows editors to correctly record the even and odd addresses along its sides. 3.2.6 Winter Roads and Ice Bridges For winter roads and ice bridges over water bodies, editors should only represent their approximate location. A detailed representation of these roads is not required since their location may vary by season. For these types of features over land, how- ever, editors should represent their seasonal paths when they exist, but due to their shifting locations, winter roads and ice bridges do not require positional accuracy. 3.2.7 Minimum Size of a Road at Junctions e NRN suggests that the minimum length for a road segment between two end points should never be shorter than half the width of a standard lane, which is approximately 4.0 meters. As illustrated in Figure 21, editors should therefore only represent roads with a minimum length of 2.0 metres. Community Road Network Guide to Best Practices v4.0 14

• Cover
• 1 Overview
• 2 Data Standards
• 3 Road Features
• 3.1 Road Classification
• 3.1.1 Specialized Roads
• 3.1.2 Roundabouts
• 3.1.3 New Roads
• 3.2 Road and Centreline Representation
• 3.2.1 Grade Separated Road Crossings
• 3.2.2 Lanes Divided by Medians
• 3.2.3 Multi-Lane Intersections
• 3.2.4 Access and Exit Ramps
• 3.2.5 Cul-de-Sacs
• 3.2.6 Winter Roads and Ice Bridges
• 3.2.7 Minimum Size of a Road at Junctions
• 3.2.8 Roads Crossing Administrative Boundaries
• 3.3 Road Attributes
• 3.3.1 Address Range Assignment
• 3.3.2 Functional Road Classes
• 3.3.3 Number of Lanes
• 3.3.4 Surface Material
• 3.3.5 Route Number
• 3.3.6 Route Name
• 3.3.7 Exit Number
• 3.3.8 Road Level
• 3.3.9 Road Structure
• 4 Blocked Passage Features
• 5 Toll Point Features
• 6 Ferry Segment Features
• 7 Data Quality Checks for NG9-1-1
• 8 References
• Appendix A: Attribution
• A.1 Data Model Attributes
• A.2 Additional Attributes
• Appendix B: Feature Attribute Values (Domains)
• Appendix C: Attribute Data Specifications
• Figure 1 Road Segment Intersections
• Figure 2 Road Segment at End of Road (Dead End)
• Figure 3 Road Segment Crossing a Bridge
• Figure 4 Road Segments at Municipal Boundaries
• Figure 5 Road Segment Crossing a Railway
• Figure 6 Simple Roundabout at an intersection
• Figure 7 Named Roundabout
• Figure 8 Image of Complex Roundabout
• Figure 9 Two-way Road with Demarcated Traffic Lane
• Figure 10 Road without a Lane Marker
• Figure 11 Road with Parking Spaces along Sidewalk
• Figure 12 Road with Temporary Parking Lanes
• Figure 13 Road divided by a Median
• Figure 14 Centreline Separated by a Median
• Figure 15 Intersection with Right and Left Turning Lanes
• Figure 16 Freeway Interchange with Above Grade Crossings
• Figure 17 Access Ramp
• Figure 18 Street Name for Exit Ramps
• Figure 19 Cul-de-Sac without a Central Island
• Figure 20 Cul-de-Sac with a Central Island
• Figure 21 Minimum Size of a Road Element
• Figure 22 Intersection with an Offset Less than the Minimum Size
• Figure 23 Intersection with an Offset greater than the Minimum Size
• Figure 24 Address Range Assignment
• Figure 25 Address Range Assignment Split over a Median
• Figure 26 Cul-de-Sac with Even and Odd Address Range Assignment
• Figure 27 Cul-de-Sac with Address Range Following Main Road
• Figure 28 Relationship between Road Classes
• Figure 29 Bridge Road Structure
• Figure 30 Dam Road Structure
• Figure 31 Permanently Blocked Passage
• Figure 32 Blocked Passage with Removable Barrier
• Figure 33 Toll Point and Infrastructure
• Figure 34 Ferry Route between Two Boarding Points
• Figure 35 Multiple Ferry Routes from same Boarding Point
• Table 1 Road Segment Attributes
• Table 2 Additional NG9-1-1 Attributes
• Table 3 Ferry Connection Attributes
• Table 4 Toll Point Attributes
• Table 5 Blocked Passage Attributes
• Table 6 Street Type Prefixes and Suffixes
• Table 7 Directional Prefixes and Suffixes
• Table 8 Road Classifications
• Table 9 Closing Period
• Table 10 Traffic Direction
• Table 11 Digitizing Flag Direction (Left and Right)
• Table 12 Grade Level
• Table 13 Structure Type
• Table 14 Surface Material
• Table 15 Road Status
• Table 16 Toll Point Type
• Table 17 Blocked Passage Type
• Table 18 Country Left or Right
• Table 19 Province
• Table 20 Asset Responsibility
• Table 21 Acquisition Technique
• Table 22 Language Indigenous
• Table 23 Language