Idaho Administrative Code
Title IDAPA 39 - Transportation, Department of
Rule 39.03.41 - RULES GOVERNING TRAFFIC CONTROL DEVICES
Section 39.03.41.004 - INCORPORATION BY REFERENCE
Current through September 2, 2024
The "Manual on Uniform Traffic Control Devices for Streets and Highways" is published by the Federal Highway Administration of the U.S. Department of Transportation. The 2009 edition including revisions 1 and 2 of the Manual with an effective date of June 13, 2012, is hereby incorporated by reference and made a part of the Rules of the Idaho Transportation Department. The following conforming additions to the Manual are adopted by the Idaho Transportation Board:
01. Section 1A.10, Interpretations, Experimentations, Changes, and Interim Approvals. On page 7, delete paragraphs 19 and 20.
02. Section 1A.11, Relation to Other Documents.
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01 To the extent that they are incorporated by specific reference, the latest editions of the following publications, or those editions specifically noted, shall be a part of this Manual: "Standard Highway Signs and Markings" book, the Idaho Transportation Department Supplement to the Standard Highway Signs and Markings book; and "Color Specifications for Retroreflective Sign and Pavement Marking Materials" (appendix to subpart F of Part 655 of Title 23 of the Code of Federal Regulations). |
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43. "Standards and Procedures for Specific Service Signs," 20XX Edition (ITD) |
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44. "Standards and Procedures for Tourist Oriented Directional Signs (TODS) for Motorist Services Facilities Along the State Highway System Except Fully Controlled Access Highways," 20XX Edition (ITD) |
03. Table 2B-1. Regulatory Sign and Plaque Sizes. On page 46, remove R1-5b, "Stop Here for Peds," R1-5c, "Stop Here for Pedestrians," R1-6a, and R1-9a.
04. Section 2B.11. Yield Here To Pedestrians Signs and Stop Here For Pedestrian Signs (R1-5 Series). On page 54 delete "and Stop Here For Pedestrian" from the title. Replace the Section with the following:
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Standard: 01 Yield Here To Pedestrians (R1-5, R1-5a) signs (see Figure 2B-2) shall be used if yield lines are used in advance of a marked crosswalk that crosses an uncontrolled multi-lane approach. The legend Stop Here For Pedestrians shall not be used. Support: 02 Idaho law requires drivers to yield to a pedestrian in an uncontrolled crosswalk. Guidance: 03 If yield lines and Yield Here To Pedestrian signs are used in advance of a crosswalk that crosses an uncontrolled multi-lane approach, they should be placed 20 to 50 feet in advance of the nearest crosswalk line (see Section 3B.16 and Figure 3B-17), and parking should be prohibited in the area between the yield line and the crosswalk. 04 Yield lines and Yield Here To Pedestrian signs should not be used in advance of crosswalks that cross an approach to or departure from a roundabout. Option: 05 Yield Here To Pedestrian signs may be used in advance of a crosswalk that crosses an uncontrolled multi-lane approach to indicate to road users where to yield even if yield lines are not used. 06 A Pedestrian Crossing (W11-2) warning sign may be placed overhead or may be post-mounted with a diagonal downward pointing arrow (W16-7P) plaque at the crosswalk location where Yield Here To Pedestrian signs have been installed in advance of the crosswalk. 07 The legend STATE LAW may be displayed at the top of the R1-5 and R1-5a signs. Standard: 08 If a W11-2 sign has been post-mounted at the crosswalk location where a Yield Here To Pedestrians sign is used on the approach, the Yield Here To Pedestrian sign shall not be placed on the same post as or block the road user's view of the W11-2 sign. Option: 09 An advance Pedestrian Crossing (W11 -2) warning sign with an AHEAD or a distance supplemental plaque may be used in conjunction with a Yield Here To Pedestrians sign on the approach to the same crosswalk. 10 In-Street Pedestrian Crossing signs and Yield Here To Pedestrian signs may be used together at the same crosswalk. |
05. Section 2B.12, In-Street and Overhead Pedestrian Crossing Signs (R1-6, R1-6a, R1-9, and R1-9a).
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Option: 01 The In-Street Pedestrian Crossing (R1-6) sign (see Figure 2B-2) or the Overhead Pedestrian Crossing (R1-9) sign (see Figure 2B-2) may be used to remind road users of laws regarding right-of-way at an unsignalized pedestrian crosswalk. The legend STATE LAW may be displayed at the top of the R1-6 and R1-9 signs. On the R1-6 sign, the legend YIELD may be used instead of the YIELD sign symbol. |
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Standard: 08 The In-Street Pedestrian Crossing sign and the Overhead Pedestrian Crossing sign shall not be used at crosswalks on approaches controlled by a traffic control signal, pedestrian hybrid beacon, or an emergency vehicle hybrid beacon. 09 The legend STOP FOR PEDESTRIANS shall not be used on In-Street Pedestrian Crossing signs or Overhead Pedestrian Crossing signs. Support: 09a Idaho law requires drivers to yield to a pedestrian in an uncontrolled crosswalk. |
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11a The In-Street Pedestrian Crossing sign or the Overhead Pedestrian Crossing sign may be used at intersections or midblock pedestrian crossings with flashing beacons. |
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15 In-Street Pedestrian Crossing signs, Overhead Pedestrian Crossing signs, and Yield Here To Pedestrian signs may be used together at the same crosswalk. |
06. Figure 2B-2. Unsignalized Pedestrian Crosswalk Signs. On page 55, delete signs R1-5b, R1-5C, R1-6a and R1-9a.
07. Section 2B.69, SLOW AND MOVE OVER FOR STOPPED VEHICLES WITH FLASHING LIGHTS (R16-101) sign. On page 102, add the following section:
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Support: 01 State law requires drivers approaching stationary police, emergency, tow truck, or highway incident response vehicles to slow on two-lane highways and to slow and move over on multi-lane highways. Option: 02 The SLOW AND MOVE OVER FOR STOPPED VEHICLES WITH FLASHING LIGHTS (R16-101) sign (see Figure 2B-33) may be used to inform road users of the state law on multi-lane highways. Standard: 03 If used, the SLOW AND MOVE OVER FOR STOPPED VHICLES WITH FLASHING LIGHTS sign shall only be used on highways with two or more lanes in each direction. Option: 04 The legend STATE LAW may be displayed at the top of the SLOW AND MOVE OVER FOR STOPPED VHICLES WITH FLASHING LIGHTS sign. Standard: 05 If used, the legend STATE LAW shall be black with a black border on a yellow background. |
08. Figure 2B-33. Slow and Move Over for Stopped Vehicles with Flashing Lights Sign. On page 102, add the following figure:
09. Section 2B.70, CHAINS REQUIRED ON NON-EXEMPT COMMERCIAL VEHICLES (R16-201) sign. On page 102, add the following section:
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Standard: 01 CHAINS REQUIRED ON NON-EXEMPT COMMERCIAL VEHICLES (R16-201) signs (see Figure 2B-34) shall be installed when mountain passes are determined to be unsafe by the Idaho Transportation Department. If used, two or more CHAINS REQUIRED ON NON-EXEMPT COMMERCIAL VEHICLES signs shall be installed in advance of an area that has been provided for drivers to pull off of the highway to install chains on their tires (see Section 2I.07). Support: 02 Commercial vehicles required to use chains include: * Vehicles with a combined weight in excess of 26,000 pounds including a trailer with a rating of more than 10,000 pounds * Vehicles with weight in excess of 26,000 pounds 03 Commercial vehicles exempt from chain requirements include: * Idaho Transportation Department vehicles used in the maintenance of the highway * School busses or other vehicles used to transport school children and teachers * Vehicles used by farmers to transport agricultural products, supplies, or farm equipment * Mail carrier vehicles * Motor carriers transporting forest products or chips * Motor carriers transporting mining products including sand, gravel, and aggregates, but not petroleum products * Tow trucks Standard: 04 The CHAINS REQUIRED ON NON-EXEMPT COMMERCIAL VEHICLES signs shall be removed or covered when the condition no longer applies. 05 The CHAINS REQUIRED ON NON-EXEMPT COMMERCIAL VEHICLES sign shall have a black legend and border on a white background. Option: 06 The legend STATE LAW may be displayed at the top of the CHAINS REQUIRED ON NON-EXEMPT COMMERCIAL VEHICLES sign. Standard: 07 If used, the legend STATE LAW shall be black with a black border on a yellow background. |
10. Figure 2B-34. Chains Required on Non-Exempt Commercial Vehicles Sign. On page 102, add the following figure:
11. Section 2D.43, Street Name Signs (D3-1 or D3-1a).
12. Table 2E-1. Freeway or Expressway Guide Sign and Plaque Sizes. On page 186, replace the first 16 lines of the table with the following:
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Sign or Plaque |
Sign Designation |
Section |
Minimum Size |
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Exit Number (plaque) | |||
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1-, 2-Digit Exit Number |
E1-5P |
2E.31 |
114 x 36 |
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3-Digit Exit Number |
E1-5P |
2E.31 |
132 x 36 |
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1-, 2-Digit Exit Number (with single letter suffix) |
E1-5P |
2E.31 |
138 x 36 |
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3-Digit Exit Number (with single letter suffix) |
E1-5P |
2E.31 |
156 x 36 |
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1-, 2-Digit Exit Number (with dual letter suffix) |
E1-5P |
2E.31 |
168 x 36 |
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3-Digit Exit Number (with dual letter suffix) |
E1-5P |
2E.31 |
186 x 36 |
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Left (plaque) |
E1-5aP |
2E.33 |
72x36 |
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Left Exit Number (plaque) | |||
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1-, 2-Digit Exit Number |
E1-5bP |
2E.31 |
114 x 60 |
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3-Digit Exit Number |
E1-5bP |
2E.31 |
132 x 60 |
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1-, 2-Digit Exit Number (with single letter suffix) |
E1-5bP |
2E.31 |
138 x 60 |
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3-Digit Exit Number (with single letter suffix) |
E1-5bP |
2E.31 |
156 x 60 |
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1-, 2-Digit Exit Number (with dual letter suffix) |
E1-5bP |
2E.31 |
168 x 60 |
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3-Digit Exit Number (with dual letter suffix) |
E1-5bP |
2E.31 |
186 x 60 |
13. Section 2E.31, Interchange Exit Numbering. On page 212, substitute the following for the fourth sentence of paragraph 04: "The exit number plaque (E1-5P) (see Figure 2E-22) shall be thirty-six (36) inches in height and shall include the word "EXIT" along with the appropriate exit number."
14. Section 2M.10, Memorial or Dedication Signing. On page 339, replace the section with the following:
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Support: 01 Legislative bodies will occasionally adopt an act or resolution memorializing or dedicating a highway, bridge, or other component of the highway. State law identifies the following as memorial highways or bridges in Idaho: * Bennett Bay Bridge on I-90 as Veterans Memorial Centennial Bridge * US-93 bridge over the Snake River as I B Perrine Bridge * US-95 between Midvale and Cambridge as Stu Dopf Memorial Highway * I-90 as the Purple Heart Trail * SH-3 as North Idaho Medal of Honor Highway * I-84 as Vietnam Veterans Memorial Highway * US-20 as Idaho Medal of Honor Highway Guidance: 02 Except as provided in Paragraphs 03 and 04, memorial or dedication names should not appear on or along a highway, or be placed on bridges or other highway components. If a route, bridge, or highway component is officially designated as a memorial or dedication, and if notification of the memorial or dedication is to be made on the highway right-of-way, such notification should consist of installing a memorial or dedication marker in a rest area, scenic overlook, recreational area, or other appropriate location where parking is provided with the signing inconspicuously located relative to vehicle operations along the highway. Option: 03 If the installation of a memorial or dedication marker off the main roadway is not practical, memorial or dedication signs may be installed on the mainline. Guidance: 04 Except as provided in paragraphs 06 and 07, freeways and expressways should not be signed as memorial or dedicated highways. Standard: 05 Where memorial or dedication signs are installed on the mainline, (1) memorial or dedication names shall not appear on directional guide signs, (2) memorial or dedication signs shall not interfere with the placement of any other necessary signing, and (3) memorial or dedication signs shall not compromise the safety or efficiency of traffic flow. Except as provided in paragraph 07, the memorial or dedication signing shall be limited to one sign at an appropriate location in each route direction, each as an independent sign installation. Sign location shall be determined by engineering judgement. 06 Memorial or dedication signs shall be installed for the Veterans Memorial Centennial Bridge, I B Perrine Bridge, and North Idaho Medal of Honor Highway. 07 The Purple Heart Trail, Vietnam Veterans Memorial Highway, and Idaho Medal of Honor Highway shall have memorial or dedication signs installed at each end of the highway and at intermediate locations along the highway. Guidance: 08 Memorial or dedication signs should have a white legend and border on a brown background. Standard: 09 Memorial or dedication signs shall be rectangular in shape. The legend displayed on memorial or dedication signs shall be limited to the name of the person or entity being recognized and a simple message preceding or following the name, such as "Dedicated to" or "Memorial Parkway." Additional legend, such as biographical information, shall not be displayed on memorial or dedication signs. Except as provided in paragraph 10, decorative or graphical elements, pictographs, logos, or symbols shall not be displayed on memorial or dedication signs. All letters and numerals displayed on memorial or dedication signs shall be as provided in the "Standard Highway Signs and Markings" book (see Section 1A.11). The route number or officially mapped name of the highway shall not be displayed on the memorial or dedication sign 10 The design of the Idaho Medal of Honor Highway sign shall include three different designs of the medal of honor. Option: 11 The lettering for the name of the person or entity being recognized may be composed of a combination of lower-case letters with initial upper-case letters. Standard: 12 Memorial or dedication names shall not appear on supplemental signs or on any other information sign on or along the highway or its intersecting routes. Support: 13 Named highways are officially designated and shown on official maps and serve the purpose of providing route guidance, primarily on unnumbered highways. A highway designated as a memorial or dedication is not considered to be a named highway. Section 2D.53 contains provisions for the signing of named highways. |
15. Section 2J.11, Signing Policy. On page 319, add the following after paragraph 01:
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Support: 01a The Idaho Transportation Department's specific service signs policy can be found in "Standards and Procedures for Specific Service Signs" (see Section 1A.11).(X-XX-19) |
16. Section 2K.07, State Policy. On page 324, add the following after paragraph 02:
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Support: 03 The Idaho Transportation Department's tourist-oriented directional signing policy can be found in "Standards and Procedures for Tourist Oriented Directional Signs (TODS) for Motorist Services Facilities Along the State Highway System Except Fully Controlled Access Highways" (see Section 1A.11). |
17. Section 4D.04, Meaning of Vehicular Signal Indications. On page 451-in the second paragraph of Item C.1, substitute the following for the first sentence: "Except when a traffic control device is in place prohibiting a turn on red or a steady RED ARROW signal indication is displayed, vehicular traffic facing a steady CIRCULAR RED signal indication is permitted to enter the intersection to turn right or turn left from a one-way or two-way street into a one-way street, after stopping."
18. Table 6F-1. Temporary Traffic Control Zone Sign and Plaque Sizes. On page 578, remove R2-6aP, "Begin Higher Fines Zone," R2-6bP, "Fines Double (plaque)," and R2-10, "$XX Fine (plaque)."
19. Figure 6F-3. Regulatory Signs and Plaques in Temporary Traffic Control Zones. On page 584, remove figures R2-6aP, R2-6bP, and R2-10.
20. Section 6B.12, Work Zone and Higher Fines Signs and Plaques. On page 586, replace the section with the following:
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Standard: 01 Where increased fines are imposed for exceeding a reduced speed limit, a FINES HIGHER (R2-6P) plaque (see Figure 6F-3) shall be installed as a supplement to a Speed Limit (R2-1) sign to identify the beginning point of the higher fines zone. Support: 02 Law enforcement can assess higher fines if signs indicate the TTC zone, the reduced speed limit, and notice of the enhanced penalty for exceeding the reduced speed limit. Guidance: 03 If a FINES HIGHER plaque is used with a Speed Limit sign, an END HIGHER FINES ZONE (R2-11) sign (see Figure 6F-3) should be installed at the downstream end of the zone to notify road users of the termination of the increased fines zone. Option: 04 Individual signs and plaques for TTC zone speed limits and higher fines may be combined into a single sign or may be displayed as an assembly of signs and plaques. 05 An END WORK ZONE SPEED LIMIT (R2-12) sign (see Figure 6F-3) may be installed at the downstream end of the reduced speed limit zone 06 A WORK ZONE (G20-5aP) plaque (see Figure 6F-3) may be installed above a Speed Limit sign to emphasize the speed limit in a TTC zone. |
21. Table 7B-1. School Area Sign and Plaque Sizes. On page 733, remove R1-6a, "In-Street Ped Crossing," R1-6c, "In-Street Schoolchildren Crossing," and S4-2P, "When Children Are Present."
22. Figure 7B-1. School Area Signs. On page 735, remove figure S4-2P.
23. Section 7B.11. School Advance Crossing assembly. On page 736, delete "or R1-6a" from the first sentence of paragraph 05.
24. Figure 7B-6. In-Street Signs in School Areas. On page 741, delete signs R1-6a and R1-6c and remove "and R1-6a" from note 2.
25. Section 7B.12. School Crossing Assembly.
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Option: 04 The In-Street Pedestrian Crossing (R1-6) sign (see Section 2B.12 and Figure 7B-6) or the In-Street Schoolchildren Crossing (R1-6b) sign (see Figure 7B-6) may be used at unsignalized school crossings. If used at a school crossing, a 12 x 4-inch SCHOOL (S4-3P) plaque (See Figure 7B-6) may be mounted above the sign. The STATE LAW legend on the R1-6 series signs may be omitted. |
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06 A 12-inch reduced size in-street School (S1-1) sign (See Figure 7B-6) may be used at an unsignalized school crossing instead of the In-Street Pedestrian Crossing (R1-6) or the In-Street Schoolchildren Crossing (R1-6b) sign. A 12 x 6-inch reduced size diagonal downward pointing arrow (W16-7P) plaque may be mounted below the reduced size in-street School (S1-1) sign. Standard: 07 If an In-Street Pedestrian Crossing sign, an In-Street Schoolchildren Crossing sign, or a reduced size in-street School (S1-1) sign is placed in the roadway, the sign support shall comply with the mounting height and special mounting support requirements for In-Street Pedestrian Crossing (R1-6) signs (see Section 2B.12). |
26. Section 7B.15. School Speed Limit Assembly (S4-1P, S4-2P, S4-3P, S4-4P, S4-6P, S5-1).
Effective March 31, 2022
