Reso 2007-1103 - Laserfiche WebLink

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990 -4 Portable Changeable (Variable) Message Signs. 990 -4.1 Scope. All Portable Changeable Message Signs (PCMS's) must meet the physical display and operational requirements as described in the MUTCD. Manufacturers seeking approval for their PCMS shall provide a working sample to be evaluated in accordance with these Specifications and certify that the unit meets all requirements specified herein. Permanent installations can be used but will be evaluated for each specific project or installation. These standards shall include but not be limited to the following: 990 -4.2 Display Panel and Housing: (a) The display housing assembly shall be weather -tight to protect the panel from the elements. (b) All nuts, bolts, washers and other fasteners shall be of a corrosive resistant material. (c) The message matrix panel background and frame for the changeable message assembly shall be painted flat black (must meet Federal Specification TT -E -489). (d) Servicing of all message matrix panel components shall be accomplished from the front of the message matrix panel. (e) Each message matrix panel shall provide a glare screen for each message line to aid against sun glare for non - reflecting type signs. (f) The display panel, when raised in the upright position, will have a minimum height of 7 feet [2.1 m] from the bottom of the panel to the ground. (g) The unit shall have an accessible mechanism to easily raise and lower the display assembly. A locking device shall also be provided to ensure the display panel will remain in the raised or lowered position. 990 -4.3 Message Matrix: of the 7 foot b (a) The overall dimensions b foot y 10 [ 2.1 Y 3 m] PCMS message matrix panel shall be a maximum height of 7 feet [2.1 m] by a maximum width of 10 feet [3.0 m]. The overall dimensions of the 5 feet by 8 feet [1 .5 by 2.4 m] PCMS message matrix panel shall have a maximum height of 5 foot by a maximum width of 8 foot [1,5 by 2.4 m]. (b) The message matrix panel shall contain three separate lines. Each line shall consist of eight characters, equally spaced a minimum of 3 inches [75 mm]. Each character shall contain 35 pixels in a five by seven horizontal to vertical grid arrangement. (c) Each message line of the 7 foot by 10 foot [2.1 by 3 m] PCMS shall provide for characters 13 inches [330 mm] in width by 18 inches [457 mm] in height and variable graphic and symbol sizes to a minimum of 18 inches [457 mm] in height. The 5 foot by 8 foot [1 .5 by 2.4 m] PCMS shall provide for characters 9 inches [229 mm] in width by 12 inches [305 mm] in height and variable graphic and symbol sizes to a minimum of 12 inches [305 mm] in height. (d) For flip disk matrix signs, the disk elements shall be coated on the display side with a highly reflective florescent yellow Mylar material, and on the back with a flat black to blend in with the flat black background. (e) Similar components shall be interchangeable. 990 -4.4 Electrical System: 990 -4.4.1 Diesel Engine: Meet the following: (a) The power supply and electrical system shall be self- contained within the unit. March 2007 01000 -203 03- 4122.D ��