Tower 55 to Saginaw

The south-north Santa Fe line and the former MKT line cross the east-west former Texas & Pacific line at the location of the erstwhile fabled Tower 55 (MP 355.6), where the speed limit is 20 mph and there are connectors in all four quadrants (leaving at South Tower 55), the tower  (still standing, in June, 2007) was once in the southeast quadrant, the intersection of I-20 and I-35W now bridges overhead on multiple concrete bridges (two ramps and two main roadways cross over the line), and the north connectors trail in at North Tower 55, where the former Fort Worth & Denver line starts, in between the other two lines, single track, Yard Limits, with speed limit 20 mph, heading north past the BNSF Downtown Yard, with the passenger stations on its west side and the ex-Rock Island line (and UP North yard) to its east, and then bridges over the TRE line turning east from the north end of the passenger stations, and turning just west of due north.

Automatic Bock Signals start at MP 2 (MP 2.0), still in Yard Limits, and the line turns just east of due north to make a flat crossing with the former Rock Island at UP Xing (MP 3.1), and then a flat crossing with the former Cotton Belt at FWWR Xing (MP 3.2), as that line also makes flat crossing with the former Santa Fe and former MKT just to the west, before running along the west side of the Fort Worth & Western, making a turn east-northeast alongside that line, and then turning away north-northwest at that line's Hodge, where the FW&D once made a flat crossing coming north from the former MKT line, and passing North Yard (MP 6.1), on the west side of the line, where Two Main Tracks, Yard Limits, start, with the Yard Limits ending in favor of ABS north of the yard. 

At Saginaw (MP 9.1), the former Rock Island turns north-northwest and makes a flat crossing with the former Santa Fe, which continues north and makes a flat crossing with the former Fort Worth & Denver with a connector in the northeast quadrant, with some very large grain elevators alongside the lines to the east of the flat crossings.