sentences:  After crossing King Street, northbound freight trains join the northbound Ion track at Caroline Street, cross over to the southbound Ion track just north of Erb Street and then continue north on the southbound track until just south of Northfield Drive.Southbound freight trains take the reverse path.Since freight cars are wider than the LRVs, there are gauntlet tracks at most of the Ion stations along the Waterloo Spur to keep freight trains from striking the station platforms.