Specifications include, but are not limited to: Provide a portable changeable message sign (CMS) capable of displaying three lines of alphanumeric characters with a minimum letter height of 18 inches; is visible from ½ mile under both day and night conditions; and is legible from a minimum distance of 600 feet for nighttime conditions and 800 feet for normal daylight conditions. Provide a CMS utilizing yellow (amber) LEDs with a rated minimum life of 50,000 hours for the sign legend on a black background. Provide a minimum of four LEDs per pixel. Provide a CMS that is in conformance with the current Manual on Uniform Traffic Control Devices (MUTCD) and any revisions thereto, specifically Chapter 2L. Changeable Message Signs. Provide a self-contained on-board computer containing pre-programmed messages and user-defined messages for all applications. No laptop or external computing device shall be necessary for displaying a pre-programmed or user-defined message. A list of pre-programmed messages shall be included at the time of award. A multi-level password protection system shall restrict access to the control software. Computer components must be housed in a tamper resistant compartment.