Specifications include, but are not limited to: establish a Freeway Vehicle Detection Test Bed (Test Bed) and conduct an evaluation of the viability of various freeway vehicle detection technologies to support the future deployment of a Coordinated Adaptive Ramp Metering (CARM) traffic management strategy. The results of this effort will help inform UDOT about the ability of current market products to provide highly accurate and reliable vehicle detection data input needs, along the freeway mainline, to meet the accuracy and placement needs of the CARM ATMS and adaptive system algorithms.; With the growing capital cost of widening a freeway, CARM has been identified by UDOT as a viable option to support operations to maintain the investment made through capacity improvement projects in recent history. As such, this Test Bed effort will help identify viable technology options that could be included in the pool of products to support this effort across the Department, as CARM is considered for implementation on freeway corridors across the state.; The goal of this Test Bed is to help determine the vehicle detection technology that best balances the operational, maintenance, and programmatic funding needs of UDOT to deploy CARM. Detection accuracy is critical to the success of all ramp metering applications, but of particular importance in a centralized system wide adaptive algorithm along a freeway corridor. The Department is seeking interested vehicle detection manufacturers and vendors, interested in having their products considered for inclusion in the Test Bed. The Department is requesting interested parties respond with a letter of interest to be considered as a participant in the Test Bed.; The Test Bed is anticipated to include an extended field deployment at a point location along I-15 in Salt Lake County. The evaluation will be based on data over several months in order to cover all environmental and weather events that occur in the Salt Lake area. Upon completion of the Test Bed, UDOT will use the findings to identify specific technologies with the ability to meet CARM accuracy and placement standards that could be used to support a UDOT CARM application on Utah freeways.