The approach used to start with the cumulative failure rate function for the Weibull distribution and then estimate least squares values for the Weibull parameters. These results verify that the Weibull distribution provides a good representation of time to failure for the AC Gate and Ticket Transport system. Plazas have multiple lanes. If one lane is non-operational, traffic uses other operational lanes. Thus, lanes are considered to operate in parallel.
Most plazas serve traffic flowing in two directions.
Only the lanes with the same orientation are considered to operate in parallel. A given lane is neither in parallel or series with lanes serving other directional orientations. Thus, for a plaza that typically consists of two directional orientations, an appropriate measure of plaza MTTF is the lane weighted-average of the MTTF values for each direction. Please provide a discussion of efficient corrective measures that might be employed is this goal is not met. This work is based on contractual work sponsored by the Florida Department of Transportation and the Western Data Division of the Cubic Corporation.