Gas prices across the Midwest are dropping now that the refinery troubles in Indiana that caused costs at the pump to spike earlier this month are fixed.

Motorists in Michigan and other Great Lakes states can expect to see prices plummet 20-50 cents a gallon over the next two weeks.

The largest crude distillation unit at BP's refinery in Indiana broke down; it handles more than half of the refinery's capacity.  That caused gas prices in metro Detroit to skyrocket more than 50 cents in a week.

BP announced Tuesday that the facility was back on track.  Here's more from the Detroit Free Press.