How did MN/DOT measure customer satisfaction?
Cambridge Systematics, the independent consultant who oversaw the ramp meter studies, conducted random telephone surveys of 500 commuters in the Twin Cities metropolitan area in September 2001. The purpose of the surveys was to assess the public’s perception of the interim ramp metering system implemented in December 2000, following completion of the shutdown experiment. The survey design and sampling plans were similar to that used to gauge public reaction to the old ramp metering system in September/October 2000 and to the ramp meter shutdown experiment in October/November 2000. The major difference was that previously a random survey of 250 commuters and four corridor-specific surveys of 125 commuters each were completed. During this recent market research period, a single random survey of 500 commuters was conducted instead. There were no significant differences in the findings of the earlier random survey versus the corridor-specific surveys.
