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Ground Level: A feature's vertical point on the ground used as a reference plane to define features above it Highway: A high-speed, multi-lane—with two to six lanes—thoroughfare with a combination of interchanges controlled by access points Interchange: A grade-separated intersection with one or more turning lanes for travel between thoroughfares Intersection: An area where two (or more) roads meet Lane: A road that accommodates one vehicle Local Road: Low-speed thoroughfare allowing full access to property Loop-back: A digital line segment that overshoots an intended end point which then returns in a loop to the original line segment Major Arterial Roads: Multi-lane thoroughfare with high traffic capacity for up to six lanes with controlled access points (i.e., traffic lights) and property access Mapping Editor: A GIS technician that creates or modifies digital maps Median: A physical barrier between two roadways Minor Arterial Roads: Medium, multi-lane thoroughfare with capacity for two to four lanes with controlled access points and some property access National Emergency Number Association (NENA): A United States organiza- tion, with Canadian subcommittees, for developing 911 GIS standards Next Generation (NG9-1-1): An initiative to enable IP device location, text messaging, and video coupled with GIS as the primary method to determine emergency service locations on a map National Road Network (NRN): e federal government of Canada's road net- work dataset Overlap: A digital line or polygon that unintentionally overlaps another feature Overshoot: A digital line that runs past its intended end point Public Safety Answering Point (PSAP): A centre where calls for emergency services are received Ramp: A roadway that connects two or more thoroughfares Recreational Road: A road to access a recreational site Resource Road: A road for nonpublic use that allows access to resource based activities such as logging, mining, or well-head access Road: A synonym for thoroughfare Roadway: A synonym for thoroughfare Road Classification: A class based on a road's physical characteristics and intended use Road Segment: A digital representation of a road as a single line between two end points Road Structure: A man made structure that allows a road to cross another road, railway, or natural feature such as a bridge Community Road Network Guide to Best Practices v4.0 vii

• 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