R4 Series — Passing, Keep Right, and Slow Traffic Signs

Passing restrictions, keep-right and keep-left variants, slow-vehicle turn-outs, shoulder restrictions, and bicycle-related regulatory signs.

25

Signs in R4

4

Download Formats

Reference

Verify Current Standards

Series

Sign Code

Category

Showing 1–24 of 25 R4 Series Signs

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Slower Traffic Keep Right

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R4-4

Begin Right Turn Lane Yield to Bikes

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R4-5

Trucks Use Right Lane

Keep Right (Horizontal Arrow)

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R4-7b

Keep Right (Diagonal Arrow)

Keep Left — Horizontal Arrow

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R4-8b

Keep Left — Diagonal Arrow

Stay in Lane to Merge Point

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R4-10

Runaway Vehicles Only

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R4-12

Slow Vehicles with 5 or More Following Vehicles Must Use Turn-Out

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R4-13

Slow Vehicles Must Use Turn-Out Ahead

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R4-14

Slow Vehicles Must Turn Out

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R4-16

Keep Right Except to Pass

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R4-17

Do Not Drive on Shoulder

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R4-18

Do Not Pass on Shoulder

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R4-19

Bicycle Passing Clearance

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R4-20

All Traffic — Right Arrow

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Complete sign index — all 25 signs in R4 Series

Related Resources

Sign Downloads

Find artwork, available official layouts, and manual references for individual signs.

Browse downloads

Work Zone Compliance

Ensure your signs meet MUTCD and Caltrans requirements.

Visit WorkZoneCompliance.com

Download Guide

Learn about file formats, uses, and best practices.

View Download Guide

Need R4 Series signs for a California project?

Public Ready can help you source, rent, or purchase the traffic control signs in this series through qualified providers, with expert support.

Contact Public Ready or call (323) 900-9824