North American Industry Classification System (NAICS) 1997

• 23 - Construction
• 231 - Prime Contracting
• 2313 - Engineering Construction

23131 - Highway, Street and Bridge Construction

This industry comprises establishments primarily engaged in constructing, maintaining and repairing highways, streets and bridges, public sidewalks and airport runways. A general contractor building a new roadway would normally be responsible for preparing the road bed, surfacing it, and installing any sidewalks and landscaping. Special trade contractors primarily engaged in the installation and repair of guardrails and roadway signs, and in line-painting on roadways and parking areas, are included.