---
kind: "unit"
title: "23"
title_heading: "Highways"
key: "chI/subchG/part635"
level: "part"
label: "Part 635"
heading: "Construction and Maintenance"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/23/chI-subchG-part635"
sections_count: 59
---

# Part 635 — Construction and Maintenance

Title 23 C.F.R. — Highways › Chapter I — Federal Highway Administration, Department of Transportation › Subchapter G — Engineering and Traffic Operations

## Contents

- [Subpart A — Contract Procedures](/cfr/23/chI-subchG-part635-subpartA.md)
- [Subpart B — Force Account Construction](/cfr/23/chI-subchG-part635-subpartB.md)
- [Subpart C — Physical Construction Authorization](/cfr/23/chI-subchG-part635-subpartC.md)
- [Subpart D — General Material Requirements](/cfr/23/chI-subchG-part635-subpartD.md)
- [Subpart E — Construction Manager/General Contractor (CM/GC) Contracting](/cfr/23/chI-subchG-part635-subpartE.md)
- [Subpart F — Indefinite Delivery/Indefinite Quantity (ID/IQ) Contracting](/cfr/23/chI-subchG-part635-subpartF.md)