California Primary and Secondary Road Network from U.S. Census

U.S. Census Bureau TIGER/Line shapefiles provide a seamless geographic representation of California's state-managed road infrastructure. The dataset distinguishes between primary roads (MTFCC S1100), such as interstate highways, and secondary roads (MTFCC S1200), including U.S. and State Highways. It is extracted from the national Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) System.

Use Cases

• Analyze road network connectivity and density using the MTFCC S1100 and S1200 feature classifications for California.
• Calculate travel corridors by integrating primary road geometry with address range data for routing applications.
• Map state-level transportation infrastructure by combining primary and secondary road centerlines with other TIGER/Line layers.

Strengths

• Data originates from the authoritative U.S. Census Bureau MAF/TIGER System, ensuring national consistency.
• Features a clear classification system with specific MTFCC codes (S1100 for primary, S1200 for secondary roads).
• Shapefiles are designed to be standalone for California or combinable to create a seamless national road network without overlaps.

Limitations

• The dataset lacks specific metrics on row count, file size, or detailed attribute columns, limiting initial assessment of its analytical scope.
• As a geographic extract, it may not include real-time traffic data, road conditions, or detailed administrative attributes beyond core classification.
• Tags include 'Canada', which may indicate a geographic scope or metadata error not fully explained in the provided description.

Provenance

Source

U.S. Census Bureau, Department of Commerce

Collection Method

Extracted from the Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) System.

Freshness

Last updated on 2025-12-25, indicating current data.

Geography

State of California, United States.