— by Jeff Stagl

The implementation of positive train control (PTC) ranks among the U.S. rail industry's costliest and most complicated technological changeovers.

The Rail Safety Improvement Act of 2008 mandates that 30 U.S. railroads — including the Class Is, Amtrak and 22 commuter roads — install PTC on certain lines used to transport passengers or hazardous materials by 2015's end. A system designed to monitor and control train movements, PTC helps separate trains and avoid collisions, enforce speed restrictions and protect roadway workers. Each system must be interoperable so train operations are seamless and safety is enhanced between railroads.

The Federal Railroad Administration (FRA) estimates it will cost the railroads about $10 billion collectively to comply with the law, including $5.5 billion in upfront installation expenses, while safety benefits will total about $600 million.

It's a staggering price tag — one the feds could help mitigate by providing grants, tax credits or other funding mechanisms, railroads say.

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