State officials have asked federal highway experts to review the design and safety of four bypasses where eight motorists have been killed.
Seven of the fatalities have occurred on bypasses in Fond du Lac, Oconomowoc and Whitewater, each open less than a year.
One person was killed on a bypass in Fort Atkinson that opened in 1998.
All eight fatalities occurred on at-grade intersections where there are no overpasses or underpasses.
Dewayne Johnson of the state Department of Transportation says he would wait to see the conclusions of the Federal Highway Administration analysis before assigning all of the blame to the design of the intersections.
The bypasses under study are at:
--Highway 12 in Whitewater, with three fatalities since opening in August
--Highway 151 in Fond du Lac, with two fatalities since opening in September
--Highway 16/67 in Oconomowoc, with two fatalities since opening in October
--Highway 26 in Fort Atkinson, with one fatality since opening in 1998.