MRCD (MultaRadar CD) and MRCT (MultaRadar CT) are two types of radar technology used by law enforcement agencies to detect speeding vehicles. MRCD is designed to detect vehicles traveling at high speeds by using a continuous wave radar, while MRCT is a pulsed radar technology. These radars are difficult to detect by traditional radar detectors, making them a popular choice for law enforcement agencies. MRCD and MRCT radars are typically used in areas where high-speed roads and highways are located, and they are capable of detecting speeds from a long range, making it difficult for drivers to evade them.