Nationwide survey on the posting of minimum speed limit signs on Interstate freeways
Victor Muchuruza and
Transportation Research Part A: Policy and Practice, 2006, vol. 40, issue 9, 767-775
This paper presents the results of the mail out survey conducted in the United States to unveil the current state of practice related to the posting of minimum speed limit signs on Interstate freeway system. The analysis of the survey results has revealed that half of the country (25 states) posts the minimum speed limit on Interstate freeways. The most common posting is 40Â mph. There are few states that post 45Â mph and 55Â mph in some sections on Interstate freeways. The survey results has also discovered that many states raised the maximum speed limits on Interstate freeways as the consequence of the National Highway System (NHS) designation Act of 1995 without revising or studying the effect of the existing minimum speed limits on traffic operation. Implications for future research relates to a multi state study which will evaluate the relevance of minimum speed limits on speed variability that is created by the posting of minimum speed limit.
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