July 2018 Traffic Engineering Manual Chapter 6 CHAPTER 6 - TRAFFIC SIGNS AND DELINEATION Table of Contents 6-1.00 INTRODUCTION ..................................................................................................................5 6-1.01 Purpose ........................................................................................................................................5 6-1.02 Scope ...........................................................................................................................................5 6-1.03 Chapter Organization ...................................................................................................................5 6-2.00 GLOSSARY ..........................................................................................................................6 6-3.00 LEGALITY - LEGAL AUTHORITY FOR PLACEMENT OF TRAFFIC SIGNS ....................9 6-3.01 Traffic Signs Installed by MnDOT Maintenance Forces ...............................................................9 6-3.02 Traffic Signs Installed by Contract ................................................................................................9 6-3.03 Traffic Signs Installed by Others by Maintenance Permit .............................................................9 6-4.00 GENERAL PRINCIPLES OF TRAFFIC SIGNING ...............................................................9 6-4.01 Principles of Traffic Control Devices .............................................................................................9 6-4.02 Basic Considerations for Installation of Traffic Signs ....................................................................9 6-4.03 Functional Classifications of Traffic Signs ....................................................................................10 6-4.04 Department Classification by Sign Design Type ...........................................................................11 6-4.05 Elements of Traffic Sign Design ...................................................................................................14 6-4.06 Lateral Offset and Vertical Clearance Requirements ...................................................................16 6-4.07 Sign Installation and Maintenance Practices ................................................................................17 6-4.08 Implementation of Signing ............................................................................................................19 6-5.00 APPLICATION GUIDELINES-REGULATORY SIGNS .........................................................21 6-5.01 Purpose ........................................................................................................................................21 6-5.02 Typical Sign Placement ................................................................................................................21 6-5.03 Bridge Speed and Load Restrictions ............................................................................................22 6-5.04 Bus Shoulder Sign (R4-X7) ..........................................................................................................24 6-5.05 BYPASS LANE Sign (R4-X8) and BYPASS AND TURN LANE Sign (R4-X8a) ............................24 6-5.06 DO NOT PASS Sign (R4-1) ..........................................................................................................24 6-5.07 Flashing LED STOP and YIELD Signs .........................................................................................24 6-5.08 In-Street Pedestrian Crossing signs (R1-6 series) ......................................................................26 6-5.09 Intersection Stop Control ..............................................................................................................26 6-5.10 Lane Designations ........................................................................................................................27 6-5.11 Passing Lane Sections .................................................................................................................27 6-5.12 RIGHT LANE MUST TURN RIGHT Sign (R3-7) and LEFT LANE MUST TURN LEFT Sign (R3-7) ..............................................................................................................27 6-5.13 SLOWER TRAFFIC MOVE RIGHT Sign (R4-3a) .........................................................................28 6-5.14 Speed Zone Signing .....................................................................................................................28 6-5.15 TRUCK ROUTE (R14-1) ..............................................................................................................30 6-5.16 TRUCK STOPPING LANE (R4-X4) at Railroad Crossings .........................................................30 6-5.17 Two-Way Snowmobile Trail Signing .............................................................................................30 6-5.18 VEHICLE NOISE LAWS ENFORCED Sign (R16-X13) ................................................................31 6-6.00 APPLICATION GUIDELINES - WARNING SIGNS ..............................................................32 6-6.01 Purpose ........................................................................................................................................32 6-6.02 Acceleration Lane Signing (W6-X1, W6-X2, and W20-X3) .........................................................32 6-6.03 Advance Warning Signs on Local Road Approaches (W2-6a, W3-1, W3-2, and W3-3) ..............32 6-6.04 Advisory Exit and Ramp Speed Signs (W13-2, W13-3) and Combination Horizontal Alignment/Advisory Exit and Ramp Speed Signs (W13-6, W13-7) .............................33 6-6.05 Advisory Speed Plaque (W13-1P) ................................................................................................33 6-6.06 BRIDGE ICES BEFORE ROAD Sign (W8-13) .............................................................................33 Page 6-1 July 2018 Traffic Engineering Manual Chapter 6 6-6.07 Channelized Intersections ............................................................................................................33 6-6.08 Chevron Alignment Sign (W1-8) ...................................................................................................34 6-6.09 Non-Vehicular and Vehicular Traffic Warning Signs ....................................................................35 6-6.10 Low Clearance Sign (W12-2) .......................................................................................................36 6-6.11 No Passing Zones ........................................................................................................................36 6-6.12 Passing Lane Sections .................................................................................................................37 6-6.13 SCHOOL BUS STOP AHEAD Sign (S3-1) ...................................................................................37 6-6.14 SHARE THE ROAD Plaque (W16-1P) with BICYCLE WARNING Sign (W11-1) .........................37 6-6.15 SHOULDER NARROWS Sign (W5-X1) and NO SHOULDER Sign (W8-23) ...............................38 6-6.16 Speed Reduction Sign (W3-5) ......................................................................................................38 6-6.17 Truck Hauling Signs ......................................................................................................................39 6-6.18 Typical Signing for Transitions Between Divided Highway Section and Two-Lane, Two-Way Sections ........................................................................................................................39 6-6.19 Truck Rollover Warning Sign (W1-13) ..........................................................................................39 6-6.20 WATCH FOR BUSES ON SHOULDER Sign (W14-X9) ...............................................................39 6-6.21 WATCH FOR FALLEN ROCK (W14-X1) ......................................................................................39 6-6.22 WEIGHT RESTRICTION AHEAD Sign (W14-X3) ........................................................................39 6-7.00 APPLICATION GUIDELINES - GUIDE SIGNING ................................................................40 6-7.01 Purpose ........................................................................................................................................40 6-7.02 Freeways ......................................................................................................................................40 6-7.03 Signing Destinations .....................................................................................................................40 6-7.04 Typical Junction Signing Layouts .................................................................................................42 6-7.05 Independent Route Marker Assemblies ........................................................................................43 6-7.06 Street Name Signs, Advance Street Name Signs, and 911 Address Signs ..................................45 6-7.07 Boundary Signs ............................................................................................................................47 6-7.08 Designated Roadways ..................................................................................................................53 6-7.09 Supplemental Guide Signing Programs .......................................................................................55