Traffic responsive controllers normally react to, rather than prevent congestion. As mentioned, traffic responsive controllers usually apply metering rates based on traffic data from the previous minute, which may be too late in the case of an accident/incident. Furthermore, traffic responsive controllers are not capable of interpreting erroneous or imprecise traffic data, which often occurs with freeway loop detectors. Fuzzy logic controllers manage to solve these problems by having short-range predictive capabilities, and can be utilized to smooth out and process imprecise or erroneous information.