---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "stV/ptA/ch205"
level: "chapter"
label: "Chapter 205"
heading: "Signal Systems"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/49/stV-ptA-ch205"
sections_count: 5
---

# Chapter 205 — Signal Systems

Title 49 — Transportation › Subtitle V — Rail Programs › Part A — Safety

## Sections

- [§20501. Definition](/usc/49/20501.md)
- [§20502. Requirements for installation and use](/usc/49/20502.md)
- [§20503. Amending regulations and changing requirements](/usc/49/20503.md)
- [§20504. Inspection, testing, and investigation](/usc/49/20504.md)
- [§20505. Reports of malfunctions and accidents](/usc/49/20505.md)