Specifications include, but are not limited to: This item shall govern the purchase of aboveground Wavetronix SmartSensor Matrix radar presence detector (RPD). An RPD detects vehicles by transmitting electromagnetic radar signals through the air. The signals bounce off vehicles in their paths and part of the signal is returned to the RPD. The returned signals are then processed to determine traffic parameters. RPDs are not affected by normal weather and environmental conditions such as rain, wind, snow, dust, etc. They also do not require cleaning and can maintain performance over a wide range of ambient temperatures. RPDs provide a non-intrusive means of detecting traffic. This property not only makes them safer to install but also more cost effective than sensors that require roadway modifications or placement. ; 3.6.1 The RPD shall support a maximum of eight zones. 3.6.2 The RPD shall support four channels and have user-selectable channel assignments. 3.6.3 The RPD shall use OR logic to combine multiple zones to a channel output and shall have channel output extend and delay functionality. 3.6.4 The RPD algorithms shall mitigate detections from wrong way or cross traffic. 3.6.5 The RPD system shall have fail-safe mode capabilities for contact closure outputs if communication is lost. 3.7.1 Detection Range. The RPD shall be able to detect and report presence in lanes with boundaries as close as 6 ft. (1.8 m) from the base of the pole on which the RPD is mounted. The RPD shall be able to detect and report presence in lanes located within the 140 ft. (30.5 m) arc from the base of the pole on which the RPD is mounted. 3.7.2 Field of View. The RPD shall be able to detect and report presence for vehicles within a 90-degree field of view. 3.7.3 Lane Configuration. The RPD shall be able to detect and report presence in up to 10 lanes. The RPD shall be able to detect and report presence in curved lanes and areas with islands and medians ; Wavetronix SmartSensor Matrix: Model #WX-SS-225; SmartSensor Mount: Model #WX-SS-611; SmartSensor 6-Conductor Cable (100 ft. Harness): Model #WX-SS704-100; Sensor Cable Junction Box: Model #WX-SS-710 ; Wavetronix Click 650 Cabinet Interface Device w/ SDLC Cable: Model #WX-102-0416; U-Channel Mounting Bracket Accessory Pack: Model #WX-102- 0423.