Md. Code Regs. 11.04.14.02

Current through Register Vol. 52, No. 1, January 10, 2025

Section 11.04.14.02 - Definitions

A. In this chapter, the following terms have the meanings indicated.

B. Terms Defined.

(1) "Agency" means:

(a) For a traffic control signal operated and maintained at an intersection under the control of the State, the law enforcement agency primarily responsible for traffic control at that intersection; or

(b) For a traffic control signal operated and maintained at an intersection under the control of a political subdivision, a law enforcement agency of the political subdivision that is authorized to issue citations for a violation of the Maryland Vehicle Law or local traffic laws or regulations.

(2) "Approach grade" means the percent grade of the roadway approaching the signal, expressed as:

(a) A positive number for an uphill grade; and

(b) A negative number for a downhill grade.

(3) "Approach speed" means the higher of the 85^th percentile speed or the posted speed limit, in miles per hour (mph).

(4) "Average day" means a day representing traffic volumes normally and repeatedly found at a location, typically a weekday when volumes are influenced by employment.

(5) "Deceleration rate" means the rate, expressed in feet per second per second (ft/sec²), required to stop a motor vehicle. Where, on an average day, heavy truck traffic comprises 15 percent or less of the vehicle traffic on the approach, a value of 10.0 ft/sec² shall be used. Where, on an average day, heavy truck traffic comprises more than 15 percent of the vehicle traffic on the approach, a value of 8.0 ft/sec² shall be used.

(6) "Eighty fifth percentile speed" means the speed, in miles per hour (mph), at or below which 85 percent of motor vehicles travel when not slowed by a yellow or red signal indication, traffic, weather, or other conditions.

(7) "Heavy truck" means a single unit truck with three or more axles, a tractor-trailer, or a tractor-semitrailer combination.

(8) "Traffic control signal monitoring system" means a device with one or more motor vehicle sensors working in conjunction with a traffic control signal to produce recorded images of motor vehicles entering an intersection against a red signal.

(9) "Yellow change interval" means the length of time (in seconds) that a traffic control signal displays a yellow indication before changing to red.

Md. Code Regs. 11.04.14.02

Regulations .02 adopted as an emergency provision effective April 1, 2004 (31:11 Md. R. 855); adopted permanently effective September 27, 2004 (31:19 Md. R. 1433)