Sources and reference approach

Road Infrastructure Explained is educational. It uses public, generally available source categories to support plain-English explanations.

Common reference types

• Federal, state, provincial, and local transportation agency guidance.
• Federal Highway Administration pavement, bridge, roadway, and safety resources.
• PIARC / World Road Association road maintenance and transport-infrastructure resources.
• World Bank and road-safety resources for international context.
• Public works and municipal infrastructure manuals where appropriate.

Examples of useful public sources

• Federal Highway Administration
• FHWA bridge preservation resources
• FHWA pavement preservation resources
• PIARC / World Road Association
• World Bank transport resources

Readers should use local standards and qualified professionals for project-specific decisions.