Positive Train Control

Positive Train Control (PTC) is installed on 100 percent of required rail lines and implemented on 80 percent of required lines, including all required passenger train routes. 

One of the most challenging parts of PTC implementation is ensuring system interoperability among all U.S. rail lines and locomotives. PTC is implemented on 80 percent of Union Pacific's required route miles, bringing the total number of PTC-operated route miles to 13,597.

We continue working with other freight and passenger railroads to safely implement PTC on the remaining 4,000 required route miles.

PTC Implementation Background

Union Pacific filed a revised implementation plan in 2016, the goal was full PTC implementation on all required lines by the end of 2018. However, as we implemented this complex suite of technologies across our network, the largest one in the U.S., unanticipated operational issues developed.

These issues take many forms, all of which are magnified on an interconnected rail network. Unintended braking events, terminal dwell, and lower velocity collectively play a role in increasing variability. We are working diligently to resolve these issues, while maintaining the health, safety, resiliency, and fluidity of the rail network. We will continue our efforts to improve our operations and implement the remaining segments.

As permitted by Federal statute, Union Pacific filed with the Federal Railroad Administration an alternative PTC implementation schedule on the remaining segments as soon as practicable, but no later than the end of 2020. We remain committed to PTC. The alternative schedule provides flexibility to problem solve issues that arise, ensuring this critical safety system is implemented correctly.