QMS1000 utilizes one portable changeable message sign (PCMS) and one trailer mounted arrow board both with a radar system and a modem. The QMS1000 monitors traffic approaching an active work zone and then displays preprogrammed messages based upon the traffic’s behavior. For example, when traffic is flowing at or near normal speed, the PCMS placed upstream (1-2 miles) from the arrow board displays a message such as ROAD WORK AHEAD. When the traffic falls below a specified rate of speed, the radar unit senses the change and relays the information to the PCMS which then displays a message such as SLOW TRAFFIC AHEAD.
Should approaching traffic come to a stop, the radar would once again relay the information to the CMS which would automatically display a message such as STOPPED TRAFFIC AHEAD. When traffic queuing is occurring near the PCMS, the PCMS will detect the traffic queue and send a automated text alert to the traffic control person in charge or the Traffic Management Center. Based on the alert PCMS can be relocated or other counter measure can be deployed for traffic queuing.