Minnesota, United States

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During a 1998 snow storm, Mn/DOT reduced roadway clearance costs by 18 percent on I-90 by activating a freeway gate closure system to limit vehicle interference and reduce snow compaction problems that increase work for plows.

FINDINGS An analysis of gate operations during a severe winter storm was also performed. On November 11, 1998 a snowstorm prompted closure of Interstate 90 between the South Dakota state line and US…
Content type
Date Posted
10/09/2001

An analysis of the I-90 ramp closure system in Minnesota found benefit-cost ratios ranging from 0.13:1 to 3:1 with varying estimates of crash and delay reductions.

FINDINGSThe benefit-to-cost analysis focused on costs of the Interstate 90 gate system and associated benefits due to delay and accident reductions. The annual frequency of snow/ice related…
Content type
Date Posted
10/09/2001