Idaho Supplementary Guidance to the MUTCD

1 Idaho Transportation Department traffic Manual: Idaho Supplementary Guidance to the MUTCDA pril 2020 This Page Intentionally Left Blank traffic Manual: Idaho Supplementary Guidance to the MUTCD Page TC-1 April 2020 traffic MANUAL: Idaho Supplementary Guidance TO THE MUTCD TABLE OF CONTENTS Page PART 1 GENERAL CHAPTER 1A GENERAL Section Purpose of traffic Control Devices ..1 Section Principles of traffic Control Devices ..1 Section Design of traffic Control Devices ..1 Section Placement and Operation of traffic Control Devices ..1 Section Maintenance of traffic Control Devices ..1 Section Uniformity of traffic Control Devices ..1 Section Responsibility for traffic Control Devices ..1 Section Authority for Placement of traffic Control Devices ..1 Section Engineering Study and Engineering Judgment ..2 Section Interpretations, Experimentations, Changes, and Interim Approvals.

2 2 Section Relation to Other Publications ..2 Section Color Code ..4 Section Definitions of Headings, Words, and Phrases in this Manual ..4 Section Meanings of Acronyms and Abbreviations in this Manual ..4 Section Abbreviations Used on traffic Control Devices ..4 PART 2 SIGNS CHAPTER 2A GENERAL Section Function and Purpose of Signs ..5 Section Definitions ..5 Section Standardization of Application ..5 Section Excessive Use of Signs ..5 Section Classification of Signs ..5 Section Design of Signs ..5 Section Retroreflectivity and Illumination ..5 Section Maintaining Minimum Retroreflectivity ..5 Section Shapes ..6 Section Sign Colors ..6 Section Dimensions ..6 Section Symbols ..6 Section Word Messages ..6 Section Sign Borders ..6 Section Enhanced Conspicuity for Standard Signs ..7 Section Standardization of Location ..7 Page TC-2 traffic Manual: Idaho Supplementary Guidance to the MUTCD April 2020 Section Overhead Sign Installations.

3 7 Section Mounting Height ..7 Section Lateral Offset ..7 Section Orientation ..7 Section Posts and Mountings ..7 Section Maintenance ..7 Section Median Opening Treatments for Divided Highways with Wide Medians ..7 CHAPTER 2B REGULATORY SIGNS, BARRICADES, AND GATES Section Application of Regulatory Signs ..11 Section Design of Regulatory Signs ..11 Section Size of Regulatory Signs ..11 Section Right-of-Way at Intersections ..11 Section STOP Sign (R1-1) and ALL WAY Plaque (R1-3P) ..11 Section STOP Sign Applications ..11 Section Multi-Way Stop Applications ..11 Section YIELD Sign (R1-2) ..11 Section YIELD Sign Applications ..11 Section STOP Sign or YIELD Sign Placement ..11 Section Yield Here To Pedestrians Signs (R1-5 Series) ..11 Section In-Street and Overhead Pedestrian Crossing Signs (R1-6 and R1-9) ..12 Section Speed Limit Sign (R2-1).

4 12 Section Truck Speed Limit Plaque (R2-2P) ..12 Section Night Speed Limit Plaque (R2-3P) ..13 Section Minimum Speed Limit Plaque (R2-4P) ..13 Section Higher Fines Signs and Plaque (R2-6P, R2-10, and R2-11) ..13 Section Movement Prohibition Signs (R3-1 through R3-4, R3-18, and R3-27) ..13 Section Intersection Lane Control Signs (R3-5 through R3-8) ..13 Section Mandatory Movement Lane Control Signs (R3-5, R3-5a, R3-7, and R3-20) 13 Section Optional Movement Lane Control Sign (R3-6) ..13 Section Advance Intersection Lane Control Signs (R3-8 Series) ..14 Section RIGHT (LEFT) LANE MUST EXIT Sign (R3-33) ..14 Section Two-Way Left Turn Only Signs (R3-9a, R3-9b) ..14 Section BEGIN and END Plaques (R3-9cP, R3-9dP) ..14 Section Reversible Lane Control Signs (R3-9e through R3-9i) ..14 Section Jughandle Signs (R3-23, R3-24, R3-25, and R3-26 Series) ..14 Section DO NOT PASS Sign (R4-1).

5 14 Section PASS WITH CARE Sign (R4-2) ..16 Section KEEP RIGHT EXCEPT TO PASS Sign (R4-16) and SLOWER traffic KEEP RIGHT Sign (R4-3) ..16 Section TRUCKS USE RIGHT LANE Sign (R4-5) ..16 Section Keep Right and Keep Left Signs (R4-7, R4-8) ..16 Section STAY IN LANE Sign (R4-9) ..16 Section RUNAWAY VEHICLES ONLY Sign (R4-10) ..16 Section Slow Vehicle Turn-Out Signs (R4-12, R4-13, and R4-14) ..16 traffic Manual: Idaho Supplementary Guidance to the MUTCD Page TC-3 April 2020 Section DO NOT DRIVE ON SHOULDER Sign (R4-17) and DO NOT PASS ON SHOULDER Sign (R4-18) ..16 Section DO NOT ENTER Sign (R5-1) ..16 Section WRONG WAY Sign (R5-1a) ..16 Section Selective Exclusion Signs ..17 Section ONE WAY Signs (R6-1, R6-2) ..18 Section Wrong-Way traffic Control at Interchange Ramps ..18 Section Divided Highway Crossing Signs (R6-3, R6-3a) ..18 Section Roundabout Directional Arrow Signs (R6-4, R6-4a, and R6-4b).

6 18 Section Roundabout Circulation Plaque (R6-5P) ..18 Section Examples of Roundabout Signing ..18 Section Parking, Standing, and Stopping Signs (R7 and R8 Series) ..18 Section Design of Parking, Standing, and Stopping Signs ..18 Section Placement of Parking, Stopping, and Standing Signs ..19 Section Emergency Restriction Signs (R8-4, R8-7, R8-8) ..19 Section WALK ON LEFT FACING traffic and No Hitchhiking Signs (R9-1, R9-4, R9-4a) ..19 Section Pedestrian Crossing Signs (R9-2, R9-3) ..19 Section traffic Signal Pedestrian and Bicycle Actuation Signs (R10-1 through R10-4, and R10-24 through R10-26) ..19 Section traffic Signal Signs (R10-5 through R10-30) ..19 Section No Turn on Red Signs (R10-11 Series, R10-17a, and R10-30) ..19 Section Photo Enforced Signs and Plaques (R10-18, R10-19P, R10-19aP) ..19 Section Ramp Metering Signs (R10-28 and R10-29) ..19 Section KEEP OFF MEDIAN Sign (R11-1).

7 19 Section ROAD CLOSED Sign (R11-2) and LOCAL traffic ONLY Signs (R11-3 Series, R11-4) ..20 Section Weight Limit Signs (R12-1 through R12-5) ..20 Section Weigh Station Signs (R13 Series) ..20 Section TRUCK ROUTE Sign (R14-1) ..21 Section Hazardous Material Signs (R14-2, R14-3) ..21 Section National Network Signs (R14-4, R14-5) ..21 Section Headlight Use Signs (R16-5 through R16-11) ..21 Section FENDER BENDER Sign (R16-4) ..21 Section Seat Belt Symbol ..21 Section Barricades ..21 Section Gates ..21 Section CHAINS REQUIRED Sign (R16-201) (Section is not in the MUTCD ) ..21 CHAPTER 2C WARNING SIGNS AND OBJECT MARKERS Section Function of Warning Signs ..23 Section Application of Warning Signs ..23 Section Design of Warning Signs ..23 Section Size of Warning Signs ..23 Section Placement of Warning Signs ..23 Section Horizontal Alignment Warning Signs.

8 23 Page TC-4 traffic Manual: Idaho Supplementary Guidance to the MUTCD April 2020 Section Horizontal Alignment Signs (W1-1 through W1-5, W1-11, W1-15) ..23 Section Advisory Speed Plaque (W13-1P) ..23 Section Chevron Alignment Sign (W1-8) ..23 Section Combination Horizontal Alignment/Advisory Speed Signs (W1-1a, W1-2a) ..23 Section Combination Horizontal Alignment/Intersection Signs (W1-10 Series) ..23 Section One-Direction Large Arrow Sign (W1-6) ..23 Section Truck Rollover Warning Sign (W1-13) ..24 Section Advisory Exit and Ramp Speed Signs (W13-2 and W13-3) ..24 Section Combination Horizontal Alignment/Advisory Exit and Ramp Speed Signs (W13-6 and W13-7) ..24 Section Hill Signs (W7-1, W7-1a) ..24 Section Truck Escape Ramp Signs (W7-4 Series) ..24 Section HILL BLOCKS VIEW Sign (W7-6) ..24 Section ROAD NARROWS Sign (W5-1) ..24 Section NARROW BRIDGE Sign (W5-2).

9 24 Section ONE LANE BRIDGE Sign (W5-3) ..24 Section Divided Highway Sign (W6-1) ..28 Section Divided Highway Ends Sign (W6-2) ..28 Section Freeway or Expressway Ends Signs (W19 Series) ..28 Section Double Arrow Sign (W12-1) ..28 Section DEAD END/NO OUTLET Signs (W14-1, W14-1a, W14-2, W14-2a) ..28 Section Low Clearance Signs (W12-2 and W12-2a) ..28 Section BUMP and DIP Signs (W8-1, W8-2) ..28 Section SPEED HUMP Sign (W17-1) ..28 Section PAVEMENT ENDS Sign (W8-3) ..28 Section Shoulder Signs (W8-4, W8-9, W8-17, W8-23, and W8-25) ..28 Section Surface Condition Signs (W8-5, W8-7, W8-8, W8-11, W8-13, and W8-14) 28 Section Warning Signs and Plaques for Motorcyclists (W8-15, W8-15P, and W8-16) 30 Section NO CENTER LINE Sign (W8-12) ..30 Section Weather Condition Signs (W8- 18, W8-19, W8-21, and W8-22) ..30 Section Advance traffic Control Signs (W3-1, W3-2, W3-3, W3-4).

10 30 Section Advance Ramp Control Signal Signs (W3-7 and W3-8) ..31 Section Reduced Speed Limit Ahead Signs (W3-5, W3-5a) ..31 Section DRAW BRIDGE Sign (W3-6) ..31 Section Merge Signs (W4-1, W4-5) ..31 Section Added Lane Signs (W4-3, W4-6) ..32 Section Lane Ends Signs (W4-2, W9-1, W9-2) ..32 Section RIGHT (LEFT) LANE EXIT ONLY AHEAD Sign (W9-7) ..32 Section Two-Way traffic Sign (W6-3) ..32 Section NO PASSING ZONE Sign (W14-3) ..32 Section Intersection Warning Signs (W2-1 through W2-8) ..32 Section Two- Direction Large Arrow Sign (W1-7) ..32 Section traffic Signal Signs (W25-1, W25-2) ..32 Section Vehicular traffic Warning Signs (W8-6, W11-1, W11-5, W11-5a, W11-8, W11-10, W11-11, W11-12P, W11-14, W11-15, and W11-15a) ..32 traffic Manual: Idaho Supplementary Guidance to the MUTCD Page TC-5 April 2020 Section Non-Vehicular Warning Signs (W11-2, W11-3, W11-4, W11-6, W11-7, W11-9, and W11-16 through W11-22).