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In the Minneapolis/St. Paul, traffic speed data collected at two interstate work zones showed that when portable traffic management systems were deployed, work zone traffic volumes increased 4 to 7 percent during peak periods.

Speed information from machine vision cameras was used to evaluate the effects of PTMS on the work zone traffic conditions. This involved assessing changes in the variability of the speeds and…
Content type
Date Posted
03/16/2007

In the Minneapolis/St. Paul, a motorist survey found 61% of drivers who experienced a portable traffic management system at a work zone felt more informed about traffic conditions than at other work zones.

SURVEY FINDINGSMotorist SurveyA telephone survey was used to poll motorists and assess their reaction to the PTMS. The target survey group included drivers who passed through the I-94 work zone…
Content type
Date Posted
03/16/2007

In the Minneapolis/St. Paul, a portable traffic management system (PTMS) installed at two interstate work zones improved safety by slowing approaching vehicles by 9 mi/hr and reducing speed variability by 70 percent.

Speed information from machine vision cameras was used to evaluate the effects of PTMS on the work zone traffic conditions. This involved assessing changes in the variability of the speeds and…
Content type
Date Posted
03/16/2007