"Traffic, traffic and more traffic"
There has not been one time that I have had the pleasure of driving down I-94 between the I-43 cutoff and Madison when there hasn't been horrible traffic. Between construction, baseball games, State Fair, the Milwaukee Mile, and weather, the traffic is always bad on I-94 east and west bound. There is probably another very good reason why traffic moves so slowly down through there. The rough roads. I realize that the winter plowing tears up the roads some, but this stretch of highway is ridiculous.
Be prepared for slow going if you are on I-94 between Milwaukee County and Waukesha County most anytime of day or night.