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Florida Administrative Code (Last Updated: April 18, 2024) |
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15. Department of Highway Safety and Motor Vehicles |
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15B. Division of Florida Highway Patrol |
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15B-2. Speed Measuring Devices |
1Tests to determine the accuracy of Average Speed Calculators shall be performed as follows:
15(1) This subsection only pertains to ground vehicles which are inputting the distance used for speed measurement by use of the ASC distance measuring feature (if so equipped):
43(a) A distance of 1/2 mile (2640 feet) or alternatively 1/4 mile (1320 feet) shall be measured, and each end of the distance marked so that it may be clearly identified from a moving vehicle or aircraft in either direction.
83(b) Vertical lines may be placed on left and right front door windows of the speed computer equipped vehicle, or the operator may use door lock knobs or other convenient visual reference points on his/her car.
119(c) The operator will drive through the measured course with both switches turned “on” when lined up with the reference point at the beginning of the course, and turned “off” when similarly lined up at the end of the course. Operator pushes the distance recall button if so equipped, and reads displayed distance in the speed timing unit. If this distance is within the acceptable tolerance of 1/2 of 1%, the unit is in calibration.
194Example: On a quarter of a mile course (0.2500) the reading should be between 0.2512 and 0.2488.
211(d) Should the error be greater than 1/2 of 1% the operator should recalibrate his unit in accordance with the manufacturer’s instructions and repeat the procedure as outlined in subsection (3).
242(2) A distance of 1/2 mile (2640 feet) should be input either by measurement or operator input. The method of input shall be consistent with the method to be used during the speed measurement. For example, if the distance at the enforcement site will use a distance measured with the ASC, then this calibration should be performed in a similar fashion. The timing device should be allowed to run for 30 seconds. A speed of 60 mph should be displayed. The test should be repeated with a time input of 20 seconds. A speed of 90 mph should be displayed. The speed displayed must be within +/- 2 m.p.h. for the unit to be considered accurate.
358(3) As an alternative to subsection (2) above, a distance of 1/4 mile (1320 feet) may be used. The distance should be input either by measurement or operator input. The method of input shall be consistent with the method to be used during the speed measurement. For example, if the distance at the enforcement site will use a distance measured with the ASC, then this calibration should be performed in a similar fashion. The timing device should be allowed to run for 15 seconds. A speed of 60 mph should be displayed. The test should be repeated with a time input of 10 seconds. A speed of 90 mph should be displayed. The speed displayed must be within +/- of 2 m.p.h. for the unit to be considered accurate.
487(4) Verification of calibration must be checked each day before any enforcement activity with the device. The results of the verification test shall be recorded and retained for further reference.
517(5) If so equipped, an internal time base will be checked the same as a stop watch under Rule 53615B-2.012, 537F.A.C.
538Rulemaking Authority 540316.1905, 541321.02 FS. 543Law Implemented 545316.1905(3)(a) FS. 547History–New 6-15-82, Formerly 15B-2.101, Amended 10-18-94, 5-23-04.
