---
kind: "unit"
title: "6"
title_heading: "Domestic Security"
key: "ch4"
level: "chapter"
label: "Chapter 4"
heading: "Transportation Security"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/6/ch4"
sections_count: 60
---

# Chapter 4 — Transportation Security

Title 6 — Domestic Security

## Contents

- [Subchapter I — Transportation Security Planning and Information Sharing](/usc/6/ch4-schI.md)
- [Subchapter II — Transportation Security Enhancements](/usc/6/ch4-schII.md)
- [Subchapter III — Public Transportation Security](/usc/6/ch4-schIII.md)
- [Subchapter IV — Surface Transportation Security](/usc/6/ch4-schIV.md)