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MINNEAPOLIS - Taking mass transit is often a safe option in the wake of a good, old-fashioned Minnesota winter storm.

That doesn't mean arriving on time is guaranteed.

Monday morning's rush hour found buses from Metro Transit struggling to keep time on its Twin Cities routes. As of 8:30 a.m. only 50 percent of buses running on time. The average delay was 7 minutes.

Metro Transit does say that the Northstar and Blue Line train service are running on time.

Frigid temperatures are having a significant impact on highways and side streets across the metro. Officials say the temps are so cold that chemicals aren't effective, meaning that snow is compacting and ice is forming, especially on the city streets of Minneapolis and St. Paul.