Skip to main content
Work Zone Compliance — A Public Ready Knowledge Resource
Home
  • Work Zone Basics
  • Temporary Traffic Control
  • MUTCD Overview
  • Traffic Control Devices
  • Work Zone Layout
  • Lane Closures and Detours
  • Pedestrian Access
  • Flagging Operations
  • Public Right-of-Way Work
  • Permits and Documentation
  • Common Compliance Issues
Sign LibraryGlossarySourcesResourcesAboutView the Sign Chart
Public Ready
Home / Signs / W20 Series — Road Work Warning Signs

W20 Series — Road Work Warning Signs

The W20 series provides advance warning of road work ahead — including road work, lane closures, detours, and flagging operations in temporary traffic control zones.

📊 View W20 Series — Road Work Warning Signs on the Sign Chart →
  • W20-1 Road Work Ahead — MUTCD traffic control sign
    W20-1 Road Work Ahead
    W20-1

    Road Work Ahead

    Warning Signs
  • W20-2 Detour Ahead — MUTCD traffic control sign
    W20-2 Detour Ahead
    W20-2

    Detour Ahead

    Warning Signs
  • W20-3 Road Closed Ahead — MUTCD traffic control sign
    W20-3 Road Closed Ahead
    W20-3

    Road Closed Ahead

    Warning Signs
  • W20-4 One Lane Road Ahead — MUTCD traffic control sign
    W20-4 One Lane Road Ahead
    W20-4

    One Lane Road Ahead

    Warning Signs
  • W20-5 Lane Closed Ahead — MUTCD traffic control sign
    W20-5 Lane Closed Ahead
    W20-5

    Lane Closed Ahead

    Warning Signs
  • W20-5a Right Lane Closed Ahead — MUTCD traffic control sign
    W20-5a Right Lane Closed Ahead
    W20-5a

    Right Lane Closed Ahead

    Warning Signs
  • W20-5b Left Lane Closed Ahead — MUTCD traffic control sign
    W20-5b Left Lane Closed Ahead
    W20-5b

    Left Lane Closed Ahead

    Warning Signs
  • W20-7 Flagger — MUTCD traffic control sign
    W20-7 Flagger
    W20-7

    Flagger

    Warning Signs
  • W20-1(CA) Road Work Ahead (California) — MUTCD traffic control sign
    W20-1(CA) Road Work Ahead (California)
    W20-1(CA)

    Road Work Ahead (California)

    Warning Signs
  • W20-7(CA) Flagger (California) — MUTCD traffic control sign
    W20-7(CA) Flagger (California)
    W20-7(CA)

    Flagger (California)

    Warning Signs
Work Zone Compliance

An educational resource for work zone compliance, temporary traffic control, public right-of-way readiness, and related field planning concepts. Requirements vary by jurisdiction, project type, agency, roadway, permit condition, and approved plan.

Work Zone Compliance is a Public Ready knowledge resource.

Public Ready · (323) 900-9824

XInstagramYouTube

Topics

  • Work Zone Basics
  • Temporary Traffic Control
  • MUTCD Overview
  • Traffic Control Devices
  • Work Zone Layout
  • Lane Closures and Detours

More Topics

  • Pedestrian Access
  • Flagging Operations
  • Public Right-of-Way Work
  • Permits and Documentation
  • Common Compliance Issues
  • Glossary

Site Info

  • Resources
  • Sources & Standards
  • Disclaimer
  • Privacy Policy
  • About This Site
  • Public Ready
  • Sign Charts (MUTCDSignChart.com)

Work Zone Compliance is a Public Ready knowledge resource. Public Ready supports traffic control plan coordination, permit readiness, and agency coordination across Southern California.

© 2026 WorkZoneCompliance.com — Educational reference only. Not legal advice. Not engineering advice. Not agency approval.