Congestion and Monitoring Advisory System (CMAS) CMAS is a  portable, automated, real-time smart work zone system that monitors vehicular speeds and traffic congestion at different points on a freeway and advises motorists to take specific actions (including taking alternate routes) according to the location, degree of congestion, or incident on the freeway, on/off ramps, or surface streets.   CMAS can be used on any freeway that experiences congestion – with or without work zones. The real-time traffic advisory information can be displayed on portable changeable signs or large, permanent overhead variable message signs, if necessary.  Each changeable message sign or solar-powered trailer is integrated with a sensor and radio/modem (or cellular routers, if necessary) mounted on it and acts as a single “device” for the purpose of directly communicating with similarly integrated “devices” at upstream or downstream locations and displaying real-time traffic condition information.  Additionally, CMAS: Allows remote control of the system from any place. Allows manual override of the messages displayed on the signs. For example, the operator can remotely display special messages, such as “ACCIDENT AHEAD" or “FREEWAY CLOSED AT RT XXX”, when a quick and effective incident management tool is needed. Provides real-time information on the internet and in rest areas, truck stops, office complexes, and large traffic generators. Integrates with cameras that can bring live pictures of the highway to the office or internet.  Major components of CMAS Microwave radar sensors Radios/modems (or cellular routers, if necessary) Software with intelligent traffic algorithm and model Mobile solar-powered trailers  Changeable message signs  Expected benefits of  CMAS: Encourages motorists to take alternate routes when delay exceeds a given threshold Encourages motorists to merge or prepare to stop Reduces spillover from off-ramps to freeway Better informs motorists and reduces their frustrations Makes work zones safer for motorists and highway workers   CMAS Introduction CMAS FAQ CMAS Photos  CMAS Hardware CMAS Brochure