As the Star-Telegram's Bill Hanna is reporting, a typical 20- or 30-minute commute could take two hours this morning because of treacherous, icy conditions. It's a far better idea to simply stay home today, if at all possible. DART is reporting that it has shut down its light-rail system in the Dallas area because the agency just wasn't able to keep the electrical components that powered it from freezing over. However, DART spokesman Mark Ball told KDFW Fox Channel 4 this morning that buses are being used as a shuttle service to connect the DART train stations. The Trinity Railway Express, a commuter rail line that is powered by diesel locomotives, is still running between Fort Worth and Dallas, but with delays. And, of course, many riders who normally use TRE to connect with DART's light-rail system are going to be frustrated when they get to Big D.