1 Colo. Code Regs. § 204-10-50
Current through Register Vol. 47, No. 22, November 25, 2024
Rule 1 CCR 204-10-50 - SLOW MOVING VEHICLES1. All machinery and equipment, including implements of husbandry, horse drawn vehicles, farm tractors, road machinery, road graders, and every vehicle which has a maximum speed that does not exceed 25 miles per hour or every vehicle capable of speeds in excess of 25 miles per hour but which in its normal operational use is moved at less than 25 miles per hour on the highway, shall display a "Slow Moving Vehicle" emblem complying with the specifications set forth in Section 7 of this regulation.2. All road construction or maintenance machinery when engaged in actual construction or maintenance work guarded by a flagman or clearly visible warning signs need not display the "Slow Moving Vehicle" emblem.3. All machinery, equipment and vehicles displaying such Slow Moving Vehicle emblem, when being transported or moved on the highways at speeds in excess of 25 miles per hour, shall have the Slow Moving Vehicle emblem removed or covered when being so moved or transported.4. Any combination of slow moving vehicles, i.e., tractor-trailers, shall display the "Slow Moving Vehicle" emblem on the rearmost unit of the combination.5. The Slow Moving Vehicle emblem shall be mounted as near the center as possible on the rear of the vehicle at a height of not less than 2 feet nor more than 6 feet from the ground to the bottom edge of the emblem. Such emblem will be mounted with a point of the triangle at the top and shall be mounted in a plane perpendicular to the direction of travel.6. The requirements for such emblem shall be in addition to any other lighting devices required by law.7. Specifications for SLOW MOVING VEHICLE Emblem.A. Description: (1) The SLOW MOVING VEHICLE Emblem (Fig. 1) shall consist of a fluorescent yellow-orange triangle with a dark, red reflective border. The yellow-orange fluorescent triangle is for daylight identification. The reflective border defines the shape of the fluorescent color in daylight and becomes a hollow red triangle in the path of motor vehicle headlights at night. B. Performance Requirements: (1)Visibility. The emblem shall be entirely visible in daylight and at night from all distances between 600 feet and 100 feet from the rear when directly in front of lawful upper beam of headlamps.(2)Dimensional requirements. The minimum size shall be as shown in Fig. 1.(3)Color and reflectivity.(a) The spectrophotometric color values of the yellow-orange fluorescent material shall have a dominant wave length of 590-610 millimicrons and a purity of 98 percent before use. After Durability Test, paragraph (4), the dominant wave length of the fluorescent material shall not change more than 10 percent.(b) The reflective material shall have minimum intensity values at each of the angles listed per Table 1. After Durability Test, paragraph (4), the minimum reflective intensity values for the reflective material shall not change more than 20 percent from the values specified in Table 1. TABLE 1. Minimum Reflective Intensity Values, R*
Divergence Angle, deg | Incidence Angle, deg | Reflective Intensity, R |
0.2 | 0 | 10 |
0.2 | 15 | 7 |
0.2 | 30 | 5 |
0.5 | 0 | 5 |
0.5 | 15 | 4 |
0.5 | 30 | 2 |
*Measurements shall be conducted in accordance with photometric testing procedures for reflex-reflectors as specified in Society of Automotive Engineers Standard, SAE J594, Reflex Reflectors, and using 50, ±3 sq. in. (322.6, ± 32.3 sq. centimers) of reflective material. The maximum dimension of the test surface shall not be greater than 1.5 times the minimum dimension. The Reflective Intensity (R) is computed from the equation.
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where
R = reflective intensity, candlepower per incident foot-candle per square foot
Lr = illumination incident upon receiver at observation point, foot-candles
Ls = illumination incident upon a plane perpendicular to the incident ray at the test specimen position, foot-candles
d = distance from test specimen to source of elimination (100 feet as specified in SAE J594), feet
A = area of test surface, square feet
(4)Durability(a) The reflective and fluorescent materials shall be tough, flexible and of sufficient thickness and strength to meet the requirements of sections B and C. After the Durability test, paragraph (4), the fluorescent and reflective material shall show no appreciable discoloration, cracking, crazing, blistering, loss of durable bond, or dimensional change.(b) Backing material for portable identification emblem shall be equivalent to 0.040 in. minimum thickness aluminum, 22-gauge minimum thickness mill-galvanized or coated sheet steel with the surface clean and receptive to a durable bond. The backing material shall be free of burrs. NOTE: These requirements are minimal and do not preclude the use of materials having superior performance.
C. Test Procedures: (1) The emblem shall be tested in conformance with the following sections from SAE J575, Test for Motor Vehicle Lighting Devices and Components: Section B- Samples for test
Section D- Laboratory Facilities
Section E- Vibration Test
Section H- Corrosion Test (pertains to face of emblem only)
(2) Durability Test. Samples shall be exposed to the sun at an angle of 45 deg to horizontal and facing south per American Society for Testing and Materials, ASTM D1014, Method of Conducting Exterior Exposure Tests of Paints on Steel. TABLE 2. Durability Test Periods
Minimum Test Period, months | Minimum Test Period, months |
Location | Fluorescent | Reflective |
Outside in Midwest | 12 | 24 |
Or |
Outside in Miami, Florida | 6 | 12 |
(3) Drop Test. Each test sample shall be dropped from a height of 5 feet (1.53 m) to a smooth hard surface equivalent to rigid metal or concrete. Each test sample shall be submitted to three drop tests: corner drop, edge drop, and flat drop. Failure shall be considered to have occurred when the emblem will no longer meet requirements in Section B.8. All "Slow Moving Vehicle" emblems must be approved for use and sale in the State of Colorado by the Department of Revenue. Such approval shall be accomplished through the A.A.M.V.A. Equipment Approval Section, Washington, D.C. FIG. 1 - IDENTIFICATION EMBLEM
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37 CR 15, August 10, 2014, effective 8/30/201437 CR 22, November 25, 2014, effective 12/15/201437 CR 24, December 25, 2014, effective 1/14/201538 CR 04, February 25, 2015, effective 3/17/201538 CR 13, July 10, 2015, effective 7/30/201538 CR 16, August 25, 2015, effective 9/14/201538 CR 22, November 25, 2015, effective 12/15/201538 CR 23, December 10, 2015, effective 1/14/201639 CR 01, January 10, 2016, effective 1/30/201639 CR 03, February 10, 2016, effective 3/1/201639 CR 09, May 10, 2016, effective 5/30/201639 CR 10, May 25, 2016, effective 6/14/201639 CR 12, June 25, 2016, effective 7/30/201639 CR 15, August 10, 2016, effective 8/30/201639 CR 16, August 25, 2016, effective 9/14/201639 CR 23, December 10, 2016, effective 12/30/201640 CR 03, February 10, 2017, effective 3/2/201740 CR 13, July 10, 2017, effective 7/30/201740 CR 16, August 25, 2017, effective 9/14/201740 CR 19, October 10, 2017, effective 10/30/201740 CR 22, November 25, 2017, effective 12/15/201741 CR 02, January 25, 2018, effective 2/14/201841 CR 03, February 10, 2018, effective 3/2/201841 CR 06, March 25, 2018, effective 4/14/201841 CR 08, April 25, 2018, effective 5/15/201841 CR 09, May 10, 2018, effective 5/30/201841 CR 10, May 25, 2018, effective 6/14/201841 CR 15, August 10, 2018, effective 8/30/201841 CR 17, September 10, 2018, effective 9/30/201841 CR 19, October 10, 2018, effective 10/30/201841 CR 22, November 25, 2018, effective 12/15/201842 CR 03, February 10, 2019, effective 3/2/201942 CR 08, April 10, 2019, effective 5/15/201942 CR 10, May 25, 2019, effective 6/14/201942 CR 11, June 10, 2019, effective 6/30/201942 CR 14, July 25, 2019, effective 8/14/201943 CR 01, January 10, 2020, effective 1/30/202043 CR 04, February 25, 2020, effective 3/16/202043 CR 06, March 25, 2020, effective 4/14/202043 CR 07, April 10, 2020, effective 5/1/202043 CR 12, June 25, 2020, effective 7/16/202043 CR 18, September 25, 2020, effective 10/15/202044 CR 13, July 10, 2021, effective 7/31/202145 CR 01, January 10, 2022, effective 1/30/202245 CR 07, April 10, 2022, effective 7/1/202246 CR 05, March 10, 2023, effective 4/3/202346 CR 07, April 10, 2023, effective 4/30/2023