With the requirement to raise the existing platforms to a level boarding height, required train inspections and maintenance can no longer be done at the raised platforms. These inspections typically happen on empty trains that stay at the station, including overnight layovers. In the future there could be up to five trains that overnight at Union Station. To complete the required inspections, these trains will need to be moved from their boarding position on either Tracks 2, 3, 4, or 5 to Track 1 where there is no plan to have a raised platform, across NW 9th Avenue on new track work, and then moved back to their boarding location. These movements will typically happen between 10 p.m. and 4 a.m. After the inspection the trains are then moved back to their boarding location. The new track work allows for these train movements to happen without impacting freight trains that pass through Union Station at night.