What is the naming convention for the cabinets and sensors?

first seven characters of the sensor name identify the cabinet in which it is found. The final character of the cabinet name can be either D or R, to distinguish between ramp-type cabinets (R), used for ramp metering, and freeway-type cabinets (D). Some more recent cabinets have an M in this position, meaning that the data collectors are microwave (radar) detectors. The sensor name contains 7 characters that describe what the sensor is: • The first and second characters indicate the road type. The first character can contain one of M (metered), A (auxiliary), or D (duplicate). The second character can contain one of M (mainline), C (collector-distributor), or R (reversible). • The third character indicates the direction (N, S, W, or E). • The fourth and fifth characters indicate the lane type. The fourth character can contain R (Rt Adv Q), L (Lt Adv Q), or H (HOV). The fifth character can contain _ (mainline), X (exit), O (on ramp), Q (queue), I (inter Q), D (demand), or P (passage). ...  more