Specifications include, but are not limited to: The following specifications apply to the purchase of a solar powered, radar speed trailer by the Iowa Department of Transportation, Iowa DOT. Speed trailers must meet requirements for temporary traffic control devices as outlined in section-6F of the most recent FHWA Manual on Uniform Traffic Control Devices. Trailers will be used at road construction sites within the State of Iowa to provide vehicle speed detection and display in a portable platform that does not require permanent installation or wiring.; Using built-in radar, the speed trailer detects the speed of an oncoming vehicle in the near lane and far lane, and then displays that speed on a full-matrix LED display informing drivers of their actual speed.; 24” character height with full matrix LED display.; MUTCD compliant.; Display continuously shows speeds of approaching vehicles over a threshold and does not flash regardless of speed limit.; Be able to display two digits in MPH.; Regulatory speed-limit sign with easily changeable speed numbers.; Approach-only K-band radar.; Compact and easily portable.; AGM Battery powered & solar charging.; Operating temperature range –20o to 165oF.; Integral control box with tamper-resistant cover that locks (with key) when latched.; Able to collect and store data (with optional equipment).; SOLAR POWERD SPEED TRAILER WITH 24-INCH CHARACTERS; POWER SYSTEM: Solar power system must charge and maintain batteries automatically without intervention, designed for year-round deployment in Iowa assuming minimal solar charging during winter months.; No component must create a shadow on any portion of the solar panels.; Battery type must be AGM (Absorbent Glass Mat) sized for seven (7) days of run time without an available charging source.; A 120-volt battery charger must be wired into the electrical system with an external 3-wire connector.; Both solar and 120-volt charging systems must be sized and regulated for AGM batteries.; System must include a low voltage shut off to prevent damage to the batteries. Shut off should not prevent the solar panels from charging the batteries.; Battery box must be lockable to prevent unauthorized access.
