You are in the CarrTracks website Picture Gallery.
The SLSF (coming south from Tulsa) and MKT shared the bridge over the Red River northeast of Denison, TX. After crossing the bridge the MKT headed southwest for Ray Yard in Denison and the SLSF went south to Irving, between Dallas and Fort Worth. In 1922 the MKT installed a 10 lever interlocking at Frisco Crossing (the junction on the north side of the river) for the joint bridge with the SLSF over the Red River. Just south of the bridge, a ballast train waits in the siding at South Joe on October 22, 1988. This is a relatively new siding. It was added when BN installed CTC between Sepulpa and Denison. The power on this train is BN 6359, DM&IR 155, and BN 6325.
It was rare to see a DM&IR locomotive in Texas. Engine 155 would return to the DM&IR and work until 1993 when it was sold to Independent Locomotive Service. The 30mph speed board is an advanced speed board warning of the 30mph speed limit over the Red River Bridge one mile ahead. Disk 90