Part 620 - Engineering

Part 625 - Design Standards for Highways

Part 626 - Pavement Policy

Part 627 - Value Engineering

Part 630 - Preconstruction Procedures

Part 633 - Required Contract Provisions

Part 634 - WORKER VISIBILITY

Part 635 - Construction and Maintenance

Part 636 - Design-Build Contracting

Part 637 - Construction Inspection and Approval

Part 640 - CERTIFICATION ACCEPTANCE

Part 645 - Utilities

Part 646 - Railroads

Part 650 - Bridges, Structures, and Hydraulics

Part 652 - Pedestrian and Bicycle Accommodations and Projects

Part 655 - Traffic Operations

Part 656 - Carpool and Vanpool Projects

Part 657 - Certification of Size and Weight Enforcement

Part 658 - Truck Size and Weight, Route Designations - Length, Width and Weight Limitations

Part 660 - Special Programs (Direct Federal)

Part 661 - Indian Reservation Road Bridge Program

Part 667 - Periodic Evaluation of Facilities Repeatedly Requiring Repair and Reconstruction Due to Emergency Events

Part 668 - Emergency Relief Program

Part 669 - Enforcement of Heavy Vehicle Use Tax

Part 680 - National Electric Vehicle Infrastructure Standards and Requirements